R. Searcy-Bernal and R. Juárez-Romero, “Length And Age Structure In Commercial Catch Samples Of The Pismo Clam Tivela Stultorum (Mawe, 1823), From Playa San Ramon, B.C., Mexico”, Cienc. Mar., vol. 17, no. 2, pp. 71–82, Mar. 1991.