Barker, R., Mangahas, M., & Meyers, W. H. (1972). The probable impact of the seed-fertilizer revolution on grain production and on farm labor requirements. Institute of Economic Development and Research, School of Economics, University of the Philippines.
Cita Chicago (17th ed.)Barker, Randolph, Mahar Mangahas, i William H. Meyers. The Probable Impact of the Seed-fertilizer Revolution on Grain Production and on Farm Labor Requirements. [Quezon City]: Institute of Economic Development and Research, School of Economics, University of the Philippines, 1972.
Cita MLA (9th ed.)Barker, Randolph, et al. The Probable Impact of the Seed-fertilizer Revolution on Grain Production and on Farm Labor Requirements. Institute of Economic Development and Research, School of Economics, University of the Philippines, 1972.