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Salazar-Hermoso, F. and Villavicencio-Garayzar, C. 1999. Relative abundance of the shovelnose guitarfish rhinobatos productus (Ayres, 1856) (Pisces: Rhinobatidae) in Bahía Almejas, Baja California Sur, from 1991 to 1995. Ciencias Marinas. 25, 3 (Mar. 1999), 401–422. DOI:https://doi.org/10.7773/cm.v25i3.715.