por Brandan, María Ester [autor] | Díaz Perches, Rodolfo [autor] | Ostrosky, Patricia [autor].
por John Lawrence Interdisciplinary Symposium on the Physical and Biomedical Sciences (2 : 1981 : Sioux Falls, Dakota del Sur) | Scott, George P [editor] | Wahner, Heinz W [editor] | Iowa State University.
por Nunn, Adrian D, 1948- [editor].