1.
Cochabamba; s.n; jun. 1973. 64 p.
Thesis
in Spanish
| LIBOCS, LILACS, LIBOE
| ID: biblio-1295584
2.
Cochabamba; s.n; jun. 1973. 64 p.
Thesis
in Spanish
| LIBOCS, LILACS, LIBOSP
| ID: biblio-1314830