This collection is composed of articles, manuscripts, and materials related to Popowski's career as author and hunter. Included are photographs, illustrations, and many articles. Bulk of collection is copies of articles authored by Popowski on the subject of hunting and wildlife.

The general materials are composed of correspondence from 1942-1956.

The illustrations consist of several loose-leaf illustrations of crows drawn by Gordon Elliott for Popowski's book titled Crow Shooting and include 29 ink drawings. Also included are two folders of photograph proofs (37 pages) for Popowski's book titled Hunting Pronghorn Antelope, 1 mat board drawing of a fireplace in what is suspected to be Popowski's cabin and drawn by C. Greenidge and one phonograph record titled Crow Calling.

The Japanese magazine Modern Hunting is composed of article submitted by Popowski.

The manuscripts are accompanied by correspondence sent to publishers and an information card, which notes to which publications Popowski sent his manuscripts, whether or not they were published and the amount he was paid for these manuscripts.

The phonograph records is composed of a recording of Popowski demonstrating crow calls. The photographs consist of several black and white photographs, mostly of wildlife and hunting, and a few negatives. Some items of note are 22 matted and signed black and white photographs that Popowski entered into a photography contest at the Iowa State Fair. He won first prize for these photographs.

The research material is the largest series is Popowski's collection of articles he had published in various hunting and wildlife publications. These articles cover a wide range of subjects from big game, crow and varmint hunting to safety and conservation issues. Included also is an autographed copy of The Outdoorsman (June 1947) in which Popowski wrote an article titled "Off-Season" Duck Hunting.