University of the Philippines (Los Banos). College of Agriculture & Department of Soils. A laboratory manual in soil science. s.n.
Chicago-Zitierstil (17. Ausg.)University of the Philippines (Los Banos). College of Agriculture und Department of Soils. A Laboratory Manual in Soil Science. [Los Banos, Laguna: s.n.
MLA-Zitierstil (9. Ausg.)University of the Philippines (Los Banos). College of Agriculture und Department of Soils. A Laboratory Manual in Soil Science. s.n.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.