1-3 of 3 Books
Soil fertility survey and research, the Philippines
Soil fertility survey and research, the Philippines
By Food and Agriculture Organization of the United Nations
Geology and mineral resources of Nueva Écija Province
Geology and mineral resources of Nueva Écija Province
By Philippines. Bureau of Mines. Map and Mineral Resources Compilation Project Team.
Land classification and supporting studies on the Upper Pampanga River Project
Land classification and supporting studies on the Upper Pampanga River Project
By Philippines. National Irrigation Administration.