Among the important papers he authored was the description of Herrerasaurus, one of the earliest dinosaurs known.
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In 1973 he received his PhD in Zoology and Paleontology from the University of London.
Osvaldo Golijov | Osvaldo Bayer | Osvaldo Ríos | Osvaldo Ardiles | Osvaldo Pugliese | Osvaldo Soriano | Osvaldo Fresedo | Osvaldo Civile | Osvaldo Valenti | Osvaldo Peralta | Osvaldo Nunez | Osvaldo Domínguez Dibb | Osvaldo de León | Osvaldo Cruz | Osvaldo Cavandoli | Osvaldo Cacciatore | Osvaldo Aranha | Cristian Osvaldo Álvarez |