@ARTICLE{10665-221347, author = {World Health Organization}, journal = {Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire}, title = {Weekly Epidemiological Record, 1977, vol. 52, 18 [full issue]}, volume = {52}, year = {1977}, number = {18}, type = {Journal / periodical articles}, pages = {153 - 164} }