Unbekannt (13)
Carr-Saunders, Alexander M.(1)
Frederick Muller Ltd. (London)(1)
Großbritannien. Colonial Office (-1966)(1)
Großbritannien. Commission on Population(1)
Kuczynski, Robert René (1876-1947)(1)
London School of Economics and Political Science (1895-)(1)
Rothamsted Experimental Station(1)
United States / Department of Agriculture (Washington D. C.)(1)
United States / Department of Agriculture / Bureau of Home Economics (Washington, D.C.)(1)