Congreso Geolo gico Internacional, XXe [sesio n, Ciudad de Me xico, 1956].
By: compilado por Jenaro Gonza lez Reyna.
Contributors: Gonza lez Reyna, Jenaro.
Publisher: [XX Congreso Geolo gico Internacional]
Published: 1956
Place of publication: Me xico
Language: spa
Number of pages: 1111