References
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- Francoeur , R. T. ( 1995 ). The complete dictionary of sexology () , 2nd ed. . New York , NY : Continuum Press .
- Francoeur , R. T. , & Noonan , R. J. ( 2004 ). The Continuum complete international encyclopedia of sexuality . New York , NY : Continuum Press .
- Teilhard de Chardin , P. ( 1965 ). The appearance of man (J. M. Cohen, Trans.) . New York , NY : Harper Collins Press .