Loya-Salinas, D., Palacios, E., & González, S. (1992). Seasonal abundances of the harbor seal (Phoca vitulina richardsi Gray 1864), at Punta Banda Estuary (B.C., Mexico). Ciencias Marinas, 18(3), 57–70. https://doi.org/10.7773/cm.v18i3.903