The breeding bird survey : its first fifteen years, 1965-1979 - Robbins, Chandler S.; Bystrak, Danny; Geissler, Paul H. (Washington, D.C. : U.S. Fish & Wildlife Service, 1986)
Keywords: AVES; ANALISIS ESTADISTICO; IDENTIFICACION; MUESTREO; DIVERSIDAD DE ESPECIES; HABITAT; CLIMATOLOGIA