Title Genres Topics Date (Start) Date (End)
Clark Hollingsworth letter to Frederic Leopold regarding a request for information on Wood Ducks, January 6, 1952 Correspondence Ornithology--Study and teaching Birds--Feeding and feeds Bird attracting 1952-01-06 N/A
A Proposed revision of the "Revised list of the Birds of Iowa" Correspondence Ornithology--Methodology Ornithology--Study and teaching Zoological specimens 1934-02-01 1934-02-28