Electronic Full Version of Serial Number 2 (Volume 2, Issue 2), "Quarterly Journal of Azhal" (ٌSummer 2002) text article 1381 per Professional Journal of Domestic Animal Science Students Scientific Association Campus of Agriculture and Natural Resources at the University of Tehran 2717-3038 2 v. 2 no. 1381 1 8 http://domesticsj.ut.ac.ir/article_75047_eb1b91eb457e69818c8dec857fcda96f.pdf