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Science
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1Published 1953### CRL customization ### ?> ### Add publisher and desc details ### ?>[Manila ?] National Research Council of the Philippines, November 1953.184 p. 23 cm.
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2Published 1954### CRL customization ### ?> ### Add publisher and desc details ### ?>Quezon City, National Research Council of the Philippines, 1954-v. illus. 25 cm.