1.
s.l; Centro Panamericano de Ecología Humana y Salud; 1984. 69 p. ilus, tab.
Monography
in Spanish
| LILACS, MINSALCHILE
| ID: lil-45960
2.
México; ECO; 1984. 69 p. graf.
Monography
in Spanish
| LILACS, MINSALCHILE
| ID: lil-374081