Gamal Mehaisen, PhD
Professor of Poultry Physiology
7 Gamaa Street, 12613 Giza, Egypt (email)
VIDEO
Please have a while to watch these videos on youtube...
https://www.youtube.com/watch?v=Sr4recOxmNc
https://www.youtube.com/watch?v=JBx_yd7wA2Q
Class: