Too often many of us focus exclusively on Scott’s Catalogues as the last word when searching for information about stamps worldwide. I recently came across a listing of catalogues that might assist both worldwide and more localized collectors: https://en.wikipedia.org/wiki/List_of_stamp_catalogues
If your initial click on a link results in a Wikipedia note indicating there is no entry for that name in its domain, you can copy and paste the name of the catalogue into Google for a wider search. Also, you may find some otherwise difficult entries at both Ebay and Amazon.
