Colón, E. D., and J. E. Berrocal. “AN EXPERIMENT ON DRAINAGE BY MEANS OF PUMPS - IN THE CANE PLOTS "MANUEL MOLINA", "FABRICA PAJAS 1a.", AND ‘FABRICA PAJAS 2a.’,‘ OF THE GIORGETTI COMPANY, IN THE MUNICIPALITY OF BARCELONETA, YEARS 1923-1925”. The Journal of Agriculture of the University of Puerto Rico, vol. 9, no. 4, Oct. 1925, pp. 257-72, doi:10.46429/jaupr.v9i4.15082.