An Information systems study on Philippine Phosphate Fertilizer Corporation

Selected indicators for the fertilizer industry 1980-1993.

Organikong paghahalaman by Dagoon, Jesse D.

Tropical soil biology and fertility a handbook of methods

Family planning and population a compendium of international statistics by Ross, John A. 1934-, Mauldin, W. Parker, Miller, Vincent C.

Soils and soil fertility by Troeh, Frederick R., Thompson, Louis M. (Louis Milton)

Fertility, family size, and structure consequences for families and children : proceedings of a Population Council Seminar, New York, 9-10 June 1992

Selected indicators for the fertilizer industry 1980-1991.

Economic approaches to modeling fertility determinants a selective review by Arroyo, Cristino R.

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Fertility, family size, and structure consequences for families and children ; proceedings of a Population Council Seminar, New York, 9-10 June 1992 by Lloyd, Cynthia B.