Items where Author is "<span class="person_name">Gras, E.</span>"
Number of items: 1.
  • What is abstinence? Definitions and examples of abstinence, to prevent the sexual transmission of the HIV virus, according to Spanish university students. (2009) M. Planes, A.B. Gomez, E. Gras, M.J.M. Sullman, S. Font-Mayolas, M. Cunill and M. Aymerich