Title Genres Topics Date (Start) Date (End)
Philip DuMont letter to George Hendrickson regarding revising the Check-List of Iowa Birds, May 31, 1956 Correspondence Bird watching Birds--Nomenclature Layout (Printing) Printing industry--Estimates 1956-05-31 N/A
Martin Grant letter to George Hendrickson regarding Checklist of Iowa Birds, June 25, 1956 Correspondence Bird watching Birds--Nomenclature Layout (Printing) 1956-06-25 N/A
Philip DuMont letter to George Hendrickson regarding Martin Grant's suggestions, July 1, 1956 Correspondence Bird watching Birds--Nomenclature Birds--Classification Layout (Printing) 1956-07-01 N/A