[1]
Thorp, J. and Rockwell Smith, L. 1933. CONCERNING THE ORIGIN OF THE WHITE QUARTZ SANDS OF NORTHERN PUERTO RICO. The Journal of Agriculture of the University of Puerto Rico. 17, 2 (Apr. 1933), 157–170. DOI:https://doi.org/10.46429/jaupr.v17i2.14248.