Romero-Orozco, E.J., and H. Bertsch. “Effects Of The Commercial Fishing Of`The Red Urchin, Strongylocentrotus Franciscanus (Echinodermata), On It’s Population Structure In Santo Tomas, Baja California, Mexico, With a Comparison Of Sampling Methods”. Ciencias Marinas, vol. 10, no. 2, Mar. 1984, pp. 85-105, doi:10.7773/cm.v10i2.440.