Romero-Orozco, E. and Bertsch, H. 1984. 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. 10, 2 (Mar. 1984), 85–105. DOI:https://doi.org/10.7773/cm.v10i2.440.