VELÁSQUEZ-M., J. G., and C. CARDONA-MEJÍA. “COMPARISON OF SAMPLING METHODS AND DEVELOPMENT OF A SEQUENTIAL SAMPLING FOR CHRYSOMELIDS AND LEAF-KEEPERS IN BEANS”. Revista Colombiana De Entomología, vol. 8, no. 3-4, Dec. 1982, pp. 11-18, doi:10.25100/socolen.v8i3-4.10311.