Looking For Some References

I mostly collect foreign coins. I've been focusing a lot on British colonials and commonwealth in the last few years. Anyone know of a reference that tells where all those mintmarks are? The mintmarks for Australia are pretty well laid out in Krause, however, the locations of quite a few others are not. Places like East Africa, BWA, Hong Kong, and others had coins minted in plain (British Royal Mint?), H (Heaton in Birmingham) and KN (King's Norton) but the mintmarks are hard to find. All too often I search and search, if I can not find a mint mark, it must be the plain variety! I'd guess I miss quite a few and spend a lot of time searching.

Similarly, is there any reference telling where foreign coins were minted. Those with mintmarks are obvious, but I don't know the ones with no mark. I came across a 1944 5 Centavos from the Dominican Republic and it seems suspiciously like a US War Nickel in every possible way. Where might I find out where this coin was minted? I did see a listing of foreign coins minted in America once a few years back, but I don't remember where I saw it.