(1962). Projections to the years 1976 and 2000: Economic growth, population, labor force and leisure, and transportation. Washington, D.C: Outdoor Recreation for America.
Παραπομπή Chicago StyleProjections to the Years 1976 and 2000: Economic Growth, Population, Labor Force and Leisure, and Transportation. Washington, D.C: Outdoor Recreation for America, 1962.
Παραπομπή MLAProjections to the Years 1976 and 2000: Economic Growth, Population, Labor Force and Leisure, and Transportation. Washington, D.C: Outdoor Recreation for America, 1962.
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