Auteur : ' Ivan Norscia 1 Preliminary survey of lemur density in the semimontane rainforest of Anka, Fort-Dauphin region Titre original : Preliminary survey of lemur density in the semimontane rainforest of Anka, Fort-Dauphin region 2006 Auteurs : ' Ivan Norscia Alison Jolly Giuseppe Donati ' Olivier G. Rahanitriniaina