Problems of adolescence : proceedings from IV international symposium, Copenhagen, 23-25 June 1969 / Union Internationale d'Hygiène et de Médicine Scolaires et Universitaires = International Union of School and University Health Medicine = Internationale Union für Schul und Universitäts Hygiene und Medizin ; edited by E. Bastholm and P. Bonnevie.

Date:

[1969]