Looking For A Reference Book Covering Medieval Low Countries

One trick I've used to find references is to go to CNG's site and do a search for the type or series of interest. Once you have the abbreviated reference names from the item descriptions, click on the references tab and do a search for the full bibliographic entry. Anything published before 1927 should be out of copyright and is likely available free at sites like books.google.com or archive.org.

Shooting from the hip a bit, as I don't have any of the main references, despite having some medieval Brabant and Flanders coins, I think you may run into an issue with the breadth of the Low Countries in both time and space (i.e. there not a one-size-fits-all reference, which you've probably already figured out).

Looking through the most recent Elsen catalog, amd assuming you would want to focus on Brabant and Flanders, I see this pattern:
Brabant - it looks like everything in your time frame is covered in the first two volumes of de Witte (Histoire monetaire des Comtes de Louvain, ducs de Brabant, et marquis de Saint Empire ROmain, 3 vols. 1894-99) , which is accessible in Numista. Ghyssens (a brief monograph with very little description, but with plates) covers everything up to the Burgundian period (1406) and cross-references de Witte. Best of all, it is sold by Elsen for just 8 euro.
Flanders - coins up to the Burgundian period show a Gaillard or Delmonte reference. Gaillard is available on-line. After 1406 it is a Van Houdt reference (De munten van de Bourgondische, Spaanse en Oostenrijkse Nederlanden en van de Franse en Hollanbdse, 2015)

Then there is the pre-1400 coinage of the smaller counties, abbeys, bishoprics (Gelderland, Hainaut, Holland, Liege, Namur, Nivelles, Stavelot, etc) which I don't think is covered in any of these, but maybe you won;t see many anyhow?

Quite messy ... Hopefully we will hear from others (I, too will be interested!)

You will never find one book covering the Low Countries , but have to look for the Southern Netherlands ( Zuidelijke Nederlanden ) , Flanders ( Vlaanderen) ,...
The book you mention is for the coins in the country of Gelderland ( in the Netherlands now ) .
I think it has to be possible to find information on internet , but it is not my speciality .
I will ask for it on next meeting ofmy coin club , but it is in August ( July holliday ) .
In the mentime , I will look on internet and found this for the Soutrhern Netherlands , but it is from1419-1794 . I think you can translate it with google .
http://users.telenet.be/munten/database.htm
In the meantime , I look further . albert

Eventually, volume 7a and 7b of this reference may become available:

https://www.fitzmuseum.cam.ac.uk/research/mec

@tdz, thank you for jump-starting this conversation and to @antwerpen and @pepactonius for the further leads. I agree that it seems like splitting this up by North/South seems to be possible. It also seems like the "in-preparation" works by Grierson, Spuffa, and Boffa are long overdue and welcome addition to the library of decades old works currently available.

With Germany, it has been a state-by-state effort for me (with the obvious exception of dated coins, which are all in Levinson). However, I feel like I am able to find virtually every coin I want to in my current reference books.

Very interesting.

If anyone else wants to explore, you can drill down to the medieval era by first clicking on "Antieken" at the left,. then clicking on "Middeleeuwen," when the next screen comes up.
The buttons on the right are then the centuries, and the entries are organized by the year of the beginning of the issue.

In addition to covering the Low Countries very broadly, and providing the catalog reference in all the books that have been mentioned on this thread (de Witte, Gaillard, van de Chijs, Van Gelder), there are entries from all the rest of Europe (Germany, France, England, Hungary ...)

Based on the photos, it has a crowd-sourced look.

Been doing some more research on this subject and found a recent article on academia.edu by Torongo and van Oosterhout, titled "A Preliminary Overview of the Leeuwengroten of Brabant Part One: Brussels". In this paper, they provide a unvarnished view of some of the reference literature for medieval Brabant numismatics. They have followed this up wih a second paper, "A Preliminary Overview of the Leeuwengroten of Brabant Part II: MONETA BRABAN."

Here is their conclusion from Part 2:




In some ways, this mirrors my own experience, although clearly my level of expertise is significantly more shallow than that of these two authors. For now, I'm still gonna pick up a copy of Ghyssens, lumps and all.