Vol. 13 No. 50 (1968)
Full Issue
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Physical Sciences

LUIS GUILLERMO DURAN S, ALFONSO LOPEZ REINA
279-283
No disponible
PDF (Spanish)

Natural Sciences

FEDERICO MEDEM
149-199
Not available
PDF (Spanish)
JOSE CUATRECASAS
201-226
Not available
PDF (Spanish)
GABRIEL DE J. ACEVEDO
237-257
Not available
PDF (Spanish)
ALBERTO MORALES ALARCON
267-272
Not available
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HERMANDO GARCIA BARRIGA
273-277
Not available
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REINHARD KAUFMANN, ENRIQUE PEREZ ARBELAEZ
293
Not available
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Earth Sciences

JESUS EMILIO RAMIREZ
228-235
Not available
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MANUEL DEL LLANO
263-265
Not available
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ALFREDO D. BATEMAN
285-289
Not available
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Mathematics

FRANCISCO LLERAS
259-261
Not available
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In Memoriam

MANUEL DEL LLANO
291
Not available
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