Development of a soil-based sampling frame for Davao del Norte - Ericta, Carmelita Nuguid 1949-. (Quezon City Philippine Statistical Association through a grant from the United States Agency for International Development, 1993)
Keywords: Soils -- Testing. -- Philippines -- Davao del Norte; Agricultural surveys -- Philippines -- Davao del Norte; Agriculture -- Philippines -- Davao del Norte -- Statistics; Soil productivity -- Philippines -- Davao del Norte