How to cite this article A.N. Naqvi and S.A. Shami, 1999. Age at First Calving in Nili Ravi Buffalo . Pakistan Journal of Biological Sciences, 2: 438-441. DOI: 10.3923/pjbs.1999.438.441 URL: https://scialert.net/abstract/?doi=pjbs.1999.438.441