Wolf, James M., and Matthew Drosdoff. “Soil Water Studies on Oxisols and Ultisols of Puerto Rico: IV. A Comparison of Techniques to Determine Water Retention at Various Tensions”. The Journal of Agriculture of the University of Puerto Rico 60, no. 4 (October 1, 1976): 513–515. Accessed November 23, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/10496.