Livret-guide de l'excursion.
APA Citation
International Geographical Congress (16th : 1949 : Lisbon, P., International Geographical Union. (1949). Livret-guide de l'excursion. Lisbonne.
MLA Citation
International Geographical Congress (16th : 1949 : Lisbon, Portugal), and International Geographical Union. Livret-guide De L'excursion. Lisbonne, 1949.
Warning: These citations may not always be complete (especially for serials).