First: Books
1- Abdel-Aleem, Kamel - cattle breeding and production and transfer – the Egyptian Knowledge House - 1977.
2 - Darwish, Mohammed Yahya - Meat Production - Cairo, 1962.
3- Ismail, Abdel Moez Ahmed, and another - Animal Health - Mosul, 1982
4- Al-Jasim, kadhim Abadi - Geography of Agriculture - Amman, 2015
5- Mari , Makhlaf shallal - Geography of Agriculture - Mosul, 1996
6 -Saleh, Ahmed Haj Taha, and others - milk cattle - Mosul, 1989
Second: The Researches
1-Noah, Abdullah - the impact of environmental changes on the production and reproductive performance in cattle - research published on the website. www.gcsar.gov.sy.
2- Jandel, Jasem Mohammed - Effect of solar radiation on animals - Journal of cows and sheep Middle East, number 32 - 2001.
3- Potter, Charlene - The impact of climate on animals and ecosystems - Manchu's research on www.llpdigital.usembassy.gov.
Third : The personal Interview
1- Interview conducted by the researcher with the agricultural engineer (Karim Juma) owner of a hatchery for poultry in Missan Governorate on 16/9/2015.