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Research and documentation are a collector's friend. In carrying out such work, it's valuable to coordinate with other collector's of the same area and compare notes (or at least have a rootbeer!)

 

Agriculture Cover Census

International Institute of Agriculture Census

(Active Updates - April 2020)

 

Leticia Conflict Cover Census

Leticia Cover Census

(Active Updates - July 2020)

 

Paleontology Checklist

Prehistoric Animals on Stamps - 1949-1989

(March 2007)

 

Sinclair Postage Meter Study

Sinclair Dinosaur Postage Meters - 1934-1968

(Active Updates - September 2018)

 

Files are in pdf format

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