Circular / University of Illinois, College of Agriculture, Agricultural Experiment Station and Extension Service in Agriculture and Home Economics.

University of Illinois (Urbana-Champaign campus). Agricultural Experiment Station, University of Illinois (Urbana-Champaign campus). Extension Service in Agriculture and Home Economics

Report of Extension Work in Agriculture and Home Economics in the United States / United States Department of Agriculture, Extension Service.

United States Extension Service

The Texas Tomato Lover's Handbook

William D. Adams

Doug Welsh's Texas Garden Almanac

Douglas F. Welsh, Aletha St. Romain

Applied Wildlife Habitat Management

Roel R. Lopez, Michael L. Morrison, Israel D. Parker

Native ferns of Iowa

Extension circular / University of Illinois, College of Agriculture, Agricultural Extension Service.