Transactions of the American geophysical union eighteenth annual meeting April 28, 29, 30, 1937 Washington, D.C. : regional meeting June 21 to 26, 1937 Denver, Colorado
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Transactions of the American geophysical union eighteenth annual meeting April 28, 29, 30, 1937 Washington, D.C. : regional meeting June 21 to 26, 1937 Denver, Colorado
National Research Council of the National Academy of Sciences, 1937