1 Walter Goldschmidt, As You Sow. three studies in the social consequences of agri business (Montclair, NJ, 1978, first published 1947).
2.
2 C. B. Koford, 'The prairie dog of the North American plains and its relations with plants, soil, and land use', in F. Bourliere (ed.), Symposium. ecology and management of wild grazing animals in temperate zones (Warsaw, IUCN, 1960), p. 340-340.
