@ARTICLE{10665-228088, author = {World Health Organization}, journal = {Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire}, title = {International travel and health : Advice for travellers at high altitudes = Voyages internationaux et santé : Conseils aux voyageurs en haute altitude}, volume = {66}, year = {1991}, number = {30}, type = {Journal / periodical articles}, pages = {222 - 223} }