Vicente-Chandler, J., Silva, S., & Figarella, J. (1956). Some Limitations in the Use of the Air Picnometer for Soil-Porosity, Soil-Moisture, and Particle-Density Determinations. The Journal of Agriculture of the University of Puerto Rico, 40(3), 179–188. https://doi.org/10.46429/jaupr.v40i3.13799