Filho GNJ, Verneque R da S, Lemos Á de M, da Silva HCM, Reis RB. Physiological and environmental effects on calving intervals in milking crossbred cows of the production system at the CNPGL/Embrapa. PAB. 1992;27(1):163-170. doi:10.1590/S1678-3921.pab1992.v27.3631