'Biology and our future world', Harpers
Tags: 1930s; 1931; 1931-9-1; Applied ecology; Biology; Conservation of natural resources; Ecology; Effect of human beings on; Environmental protection; Huxley, Julian; Nature
'The crisis in medical service', Harpers
Tags: 1930s; 1931; 1931-9-1; Cost of; Duffus, R. L. (Robert Luther); Group medical practice; Medical care; Medicine; Staffing, Funding and Institutions; United States
'Two miles up', Harpers
Tags: 1930s; 1931; 1931-9-1; Aeronautics; Aeronautics and Aerospace; Aircraft accidents; Engineering; Flight; Human factors; Physiological aspects; Psychological aspects; Psychology; Stearns, Myron M. (Myron Morris)
atom, dcmes-xml, json, omeka-xml, rss2
