• 20 Wisconsin Historical Society Library
• 9 Steenbock Library

• 18 Agricultural experiment stations
• 8 United States. Office of Experiment Stations
• 4 Alaska Agricultural Experiment Stations (U.S.)
• 1 Association of American Agricultural Colleges and Experiment Stations. Committee on Methods of Teaching Agriculture
• 1 Drainage
• 1 Hawaii Agricultural Experiment Station
• 1 Irrigation
• 1 Porto Rico Agricultural Experiment Station
• 1 Study and teaching

• 5 Alaska Agricultural Experiment Stations (U.S.)
• 2 Hawaii Agricultural Experiment Station
• 2 Porto Rico Agricultural Experiment Station
• 2 United States. Department of Agriculture. States Relations Service
• 2 United States. Office of Extension Work in the North and West
• 2 United States. Office of Extension Work in the South
• 1 Association of American Agricultural Colleges and Experiment Stations. Annual Convention
• 1 Association of American Agricultural Colleges and Experiment Stations. Committee on Methods of Teaching Agriculture
• 1 Puerto Rico. Agricultural Experiment Station, Mayaguez
• 1 United States. Agricultural Research Service

• 23 English

• 15 United States
• 4 Alaska
• 2 Puerto Rico
• 1 Hawaii

• 15 Periodicals
• 1 Abstracts

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