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