1. Unpublished M;COOPER, A.J.,1967
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3. Sexual dysfunctions in men;GUTHEIL, E.H.,1959
4. Sexual impotence and the limbic system;JOHNSON, J.;British Journal of Psychiatry,1965
5. Sexual Behaviour in the Human Male;KINSEY, A.C.; POMEROY, W.B.; MARTIN, C.E.,1948