por Monroy de Velasco, Anameli [autor].
por Guttmacher, Alan Frank, 1898- [autor] | Llamas De Sied, Maria Victoria [traductor] | Guttmacher, Alan Frank, 1898-. Understanding sex.
por Morrison, Eleanor S [autor] | Donadi, Roberto [traductor] | Price, Mila Underhill [autor].
por Johnson, Eric W [autor] | Johnson, Corinne B [autor] | Romero de Rodriguez, Beatriz [traductor] | Johnson, Eric W. Love and sex and growing up.