Softcover, Washington, D. C. Government Printing Office, 1918. Fair with no dust jacket.
Sound binding. Clean but tanned pages. Rough-cut pages worn at edges. Wrappers have general handling wear. Tear at lower edge of spine. Pencil writing at top right corner area of front. ; Detailed report on the revision of classification of rice rats in the genus Oryzomys; black and white plates, maps, index. 9.25" tall; 100 pages.