Call, L. E. (1956). The College of Agriculture and Central Experiment Station, University of the Philippines, January 27, 1951 to December 31, 1955: Progress report. International Cooperation Administration, United States of America Operations Mission to the Philippines.

Call, Leland E. The College of Agriculture and Central Experiment Station, University of the Philippines, January 27, 1951 to December 31, 1955: Progress Report. Manila: International Cooperation Administration, United States of America Operations Mission to the Philippines, 1956.

Call, Leland E. The College of Agriculture and Central Experiment Station, University of the Philippines, January 27, 1951 to December 31, 1955: Progress Report. International Cooperation Administration, United States of America Operations Mission to the Philippines, 1956.