004610000a22001210004500003000900000005001700009110007000026245012700096264006500223300001000288041000800298650003300306PH-MaWHO20241108112103.0  aInternational Seminar on Health education (1st : 1969 : Hamburg).  aBehaviour change through health education : problems of methodology : reports of fundamental research in health education.  aGeneva : bInternational Journal of Health education,c1970.  a272p.  aeng  aHealth educationxCongresses