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array(13) {
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American men of science : a biographical directory - 10th ed. (1960-1961); v. 03

int(0)
array(13) {
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American men of science : a biographical directory - 10th ed. (1960-1961); v. 02

int(0)
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American men of science : a biographical directory - 10th ed. (1960-1961); v. 01