Pérez Escolar, R. and Lugo López, M.A. 1969. Availability of Moisture in Aggregates of Various Sizes in a Typical Ultisol and a Typical Oxisol of Puerto Rico. The Journal of Agriculture of the University of Puerto Rico. 53, 2 (Apr. 1969), 113–117. DOI:https://doi.org/10.46429/jaupr.v53i2.11166.