Let's keep the air clean.

Bibliografske podrobnosti
Korporativna značnica:	University of the Philippines (Diliman) Science Education Center
Format:	Knjiga
Jezik:	English
Izdano:	Quezon City Science Education Center, University of the Philippines 1983.
Serija:	Environmental chemistry series
Teme:	Air > Pollution > Philippines. Air > Pollution > Experiments.