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80 Briefe zwischen Julian und Lotte Gumperz und Max Horkheimer, 1934 - 1942; 1 Brief von Max Horkheimer an Jerome D. Green, 05.09.1935; 1 Brief an die Rockefeller Foundation (Paris) von Julian Gumperz, 01.09.1935; 1 Brief von Julian Gumperz an Arthur Surveyer, 24.05.1935; 3 Briefe von der William M. Mortimer Company (New York) and Max Horkheimer, 1934; 4 Briefe von Julian Gumperz an die William M. Mortimer Company (New York), 1934; 2 Briefe zwischen Robert S. Lynd und Julian Gumperz, Juli 1934; 2 Briefe zwischen Julian Gumperz und Frederick Pollock, 1934; 1 Brief an Birchman & Molloy von Julian Gumperz, 16.05.1934; 1 Brief von Julian Gumperz an A. Flexner, 14.05.1934; 1 Brief an die United States Lines (New York) von Julian Gumperz, 10.05.1934; 24 Briefe zwischen Julian Gumperz und Taylor Mitchell (Capron & Marsh, New York), 1934 - 1935; 1 Brief von The Brookings Institution (Washington D.C.) an Julian Gumperz, 11.07.1934;

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One way to achieve the large sample sizes required for genetic studies of complex traits is to combine samples collected by different groups. It is not often clear, however, whether this practice is reasonable from a genetic perspective. To assess the comparability of samples from the Australian and the Netherlands twin studies, we estimated F,, (the proportion of total genetic variability attributable to genetic differences between cohorts) based on 359 short tandem repeat polymorphisms in 1068 individuals. IF,, was estimated to be 0.30% between the Australian and the Netherlands cohorts, a smaller value than between many European groups. We conclude that it is reasonable to combine the Australian and the Netherlands samples for joint genetic analyses.

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Chemical and mineralogical analyses of manganese nodules from a large number of widely spaced localities in the Pacific and Indian Oceans have shown that their mineralogy and chemical composition varies both areally and with depth of formation. This is considered to result from a number of factors, important among which are: (a) their proximity to continental or volcanic sources of elements; (b) the chemical environment of deposition, including the degree of oxygenation; and (c) local factors such as the upward migration of reduced manganese in sediments from certain areas. Sub-surface nodules appear to share the chemical characteristics of their surface counterparts, especially those from volcanic areas where sub-surface sources of elements are probably important.