@inproceedings{paperid:1026609, author = {M. Kooroshnezhad and Kalidari, Gholam Ali}, title = {Determination the frequency and types of coliforms in egg shell and egg yolk in different stages}, booktitle = {3rd international poultry veterinary congress}, year = {2012}, location = {IRAN}, keywords = {Keywords: Coliform; Escherichia coli; Citrobacter; Enterobacter; Yolk Sac}, }