Free PDF's On Stamp Subjects

Any good leads for Free PDF's on Stamp Subjects?

Hi Timm,

There's plenty of PDFs out there. What are your interests?

There is a TON of stuff (although not necessarily in PDF form) on https://stampsmarter.org/. This link from the US Govt. is a PDF guide (Pub 227) to stamp collecting in general https://www.govinfo.gov/content/pkg...po113832.pdf.

Are you interested in a PDF Machin catalog?

I would like to see as many PDF's as possible listed here so everyone can build their own philatelic library.
Knowledge is everything !

I'd like to start everything off with these two... 1 PDF and 1 website with free information.

Danish Perfin Catalogue
https://www.perfiner.dk/

Croatia stamp varieties
https://worldstampsproject.org/shs-croatia/

Timm and all,

Yep, it would be nice if it was so simple as to go to one site and find ALL available philatelic PDFs. Unfortunately, the reality of the philatelic world is not that simple or well organized. I can think of three major sites for this information in the US. And then there are sites in other countries? Try the major philatelic organizations for the country you are interested in? And then there is ggle.

I've saved a lot of PDFs over the years but only ever went looking for information when I was studying the particular country or issue of that moment in my collecting journey.