“…of the population (Nielsen and others, 1962). Other studies of the Sams0 Project have been made by Lange, Mogensen, and Fenger (1960), Mogensen, Lange, and Fenger (1960), S0rensen and Stromgren (1961), B. F. S0rensen (1961), A. S0rensen (1962), and Nielsen (1962aNielsen ( , b, c, 1963Nielsen ( , 1964Nielsen ( , 1965.…”