TY  - RPRT
TI  - Multiple linear and nonlinear regression analyses of factors causing calving difficulty.
AU  - R E Short
AU  - R A Bellows
AU  - R B Staigmiller
AU  - J B Carr
PY  - 1979
DO  - 10.1016/0093-691x(79)90078-5
UR  - https://pubmed.ncbi.nlm.nih.gov/16725439/
ID  - 16725439
ER  -