They write their dream on the rock forever : rock writings of the Stein River Valley
of British Columbia / Annie York, Richard Daly and Chris Arnett, 1993
http://authorities.loc.gov/cgi-bin/Pwebrecon.cgi?AuthRecID=2660431&v1=1&HC=1&SEQ=20091001095418&PID=Tt5SlE2tWObmVCvq0bZXCTmcxcOAh
(page Internet consultée le 01/10/09)