@book {2126,
	title = {Heredity, environment, \& personality : a study of 850 sets of twins},
	year = {1976},
	note = {John C. Loehlin \& Robert C. Nicholsgraphs, forms ; 29 cmIncludes index},
	pages = {xii, 202 p},
	publisher = {University of Texas Press},
	organization = {University of Texas Press},
	address = {Austin},
	keywords = {Environment, Genetics, Medical, Nature and nurture, Personality, Twins},
	isbn = {0292730039},
	author = {Loehlin, John C and Nichols, Robert Cosby}
}
