Environmental science 1 pupil's guide Part 2

Dades bibliogràfiques
Autor principal:	Science Education Center, University of the Philippines
Format:	Llibre
Idioma:	anglès
Publicat:	Quezon City Science Education Center, University of the Philippines 1972
Edició:	Revised experimental ed.
Matèries:	Ecology > Problems, question, exercises. Ecology > Study and teaching.