au.\*:("SCHWARCK A")
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GUIA DE LA EXCURSION PUERTO ORDAZ-GURI-CIUDAD PIAR. (RES. ET ABS.SCHWARCK A; LUCHSINGER SE; ASCANIO G et al.1971; BOL. GEOL. PUBL., VENEZ; VEN; 1971, NUM. 0005, P. 397 A 402Miscellaneous