@book{26799,
	author = {Gamal Attia Abdelhamid Elsisy and Abdelrazek Mahmoud Aly Abdelrazek , },
	title = {Effect of season and contact with females on semen characteristics and testosterone hormone level in goats / },
	publisher = {Gamal Attia Abdelhamid Elsisy , },
	year = {1997},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}