1.
Montero; s.n; mar. 1987. 54 p. tab, mapas.
Monography
in Spanish
| LILACS
| ID: lil-174675
2.
Cochabamba; s.n; dic. 1985. 78 p. ilus.
Thesis
in Spanish
| LIBOCS, LILACS, LIBOE
| ID: biblio-1295253