Salazar-Hermoso, F, and C Villavicencio-Garayzar. “Relative Abundance of the Shovelnose Guitarfish Rhinobatos Productus (Ayres, 1856) (Pisces: Rhinobatidae) in Bahía Almejas, Baja California Sur, from 1991 to 1995”. Ciencias Marinas, vol. 25, no. 3, Mar. 1999, pp. 401-22, doi:10.7773/cm.v25i3.715.