Series
- U. S. Public Health Service. Publication4
- U. S. Social Security Administration. Office of Research and Statistics. Research report1
- U. S. War dept1
- U. S. Weather Bureau. Bulletin S1
- U. S. Weather bureau. Monthly weather review. Supplement. no. 411
- U. S. Work Projects Administration. Research monograph 261
- U. of Iowa2
- U.A.S. Edn. series ; no. 21
- U.A.S. edn series ; no. 11
- U.A.S. edn. series ; no. 31
- U.A.S. edn. series ; no. 41
- U.A.S. extn. series1
- U.A.S. extn. series ; no. 21
- U.A.S. monograph series1
- U.A.S. tech. series ; no. 31
- U.B.B.P. research series4
- U.B.B.P. research series ; no. 11
- U.B.S. Background papers1
- U.C.C. Publication Dept. (Series)1
- U.D.C. pamphlet1