Vol. 13 No. 52 (1970)

Published December 28, 1970
Full Issue
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Natural Sciences

ARMANDO DUGAND
415-465
Not available
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FEDERICO MEDEM
467-471
Not available
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THOMAS VAN DER HAMMEN
473-478
Not available
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Dr. M. ACOSTA SOLIS
499-533
Not available
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FITlKAU E., J. ILLIES, J. KLlNGE, H. SCHWABE,G. , H. SIOLI, H.
535-537
Not available
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Earth Sciences

REIMER HERRMANN
479-489
Not available
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Mathematics

GABRIEL POVEDA RAMOS
491-498
Not available
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Bibliographic commentary

Not available
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In Memoriam

539
Not available
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541
Not available
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