Browse Items (4 total)

'Animals in a machine age', Harpers

Tags: 1930s; 1931; 1931-7-1; Biology; Day, Clarence; Domestication; History; Humor; Industrial relations; training; United States; Working animals; Zoology

'Grass heritage', Harpers

Tags: 1930s; 1931; 1931-7-1; Biology; Plant Sciences; Salisbury, Helen Molyneaux

'Is birth control the answer?', Harpers

Tags: 1930s; 1931; 1931-7-1; Birth control; Breckinridge, Mary; Economic aspects; Effect of birth control on; Kentucky; Medicine; Overpopulation; Reproduction and Development; Rural conditions; Rural poor; Social aspects

'The wheat farmer�s dilemma', Harpers

Tags: 1930s; 1931; 1931-7-1; Biology; Carlson, Avis D.; Economic aspects; Economic conditions; Farm mechanization; Plant Sciences; Surplus agricultural commodities; United States; Wheat farmers; Wheat trade