Conservation of soil and water for the elementary schools.

Conservation of soil and water for the elementary schools.

Detaylı Bibliyografya
Müşterek Yazar: Philippines (Republic) Bureau of Public Schools
Materyal Türü: Kitap
Dil:English
Baskı/Yayın Bilgisi: Manila [s.n.] 1957.
Konular:
Soil conservation > Study and teaching.
Water conservation > Study and teaching.