The following Eskimo-Aleutian Languages tree is based on the information in the Ethnologue.
Eskimo-Aleut Languages
Aleut Stock
Aleut (USA)
Eskimo Stock
Inuit Family
Eastern Canadian Inuktitut (Canada)
Western Canadian (Canada)
Greenlandic Inuktitut (Greenland)
North Alaskan (USA)
Northwest Alaska Iñupiat (USA)
Yupik Family
Alaskan Branch
Central Yupik (USA)
Pacific Gulf Yupik (USA)
Siberian Branch
Central Siberian Yupik (USA)
Naukan Yupik (Russia, Asia)
Sirenik Yupik (Russia, Asia)
History of the Inuit use of Latin, pictorial, Cyrillic, and syllabic writing systems, from Siberia to Greenland. Covers missionary-, Inuit-, and government-developed systems. www.collectionscanada.ca/nord/h16-7301-e.html
Phonological differences between the four Yupik (or Western Eskimo) languages of the Gulf of Alaska, southwestern Alaska, and easternmost Siberia, and the Inuit (or Eastern Eskimo) language continuum of northern Alaska, Canada, and Greenland. www.uaf.edu/anlc/yupik_inuit.html
Unesco publication describing the present state of Arctic languages and the changes that have taken place in social attitudes in the Arctic regions since the Second World War (PDF format). unesdoc.unesco.org/images/0008/000861/086162e.pdf
Discusses the various systems developed, mostly by missionaries, for representing Greenlandic, Inuttut, Yupik, and other dialects in Roman characters, picture writing, and syllabics. www.collectionscanada.ca/2/16/h16-7301-e.html