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1Publicado 1960### CRL customization ### ?> ### Add publisher and desc details ### ?>Washington, D.C. : National Science Foundation, 1960-1968.9 v. ; 26 cm.Also issued online.
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2Publicado 1957### CRL customization ### ?> ### Add publisher and desc details ### ?>Washington : National Science Foundation, Office of Scientific Information, [1957-v. ; 27 cm.Also issued online.