@book {2133,
	title = {Personality differences and biological variations: a study of twins},
	year = {1973},
	note = {by Gordon Claridge, Sandra Canter, and W. I. Humeillus. 22 cm},
	pages = {viii, 175 p},
	publisher = {Pergamon Press},
	organization = {Pergamon Press},
	edition = {[1st ed.]},
	address = {Oxford, New York},
	keywords = {Genetics, Individuality, Medical, Personality, Twins, Variation (Biology)},
	isbn = {0080171249},
	author = {Claridge, Gordon and Canter, Sandra and Hume, W. I}
}
