Proceedings for the International Conference on Salish and Neighboring Languages (ICSNL) are all available at UBC: https://lingpapers.sites.olt.ubc.ca/icsnl-volumes/ UW has an incomplete run of the proceedings: 

• 35th International Conference on Salish and Neighboring Languages (2000)
• 33rd International Conference on Salish and Neighboring Languages (1998)
• 32nd International Conference on Salish and Neighboring Languages (1997)
• 31st International Conference on Salish and Neighboring Languages (1996)
• 24th International Conference on Salish and Neighboring Languages (1989)
• 21st International Conference on Salish and Neighboring Languages (1986)
• 20th International Conference on Salish and Neighboring Languages (1985)
• 18th International Conference on Salish and Neighboring Languages (1983)
• 17th International Conference on Salish and Neighboring Languages (1982)
• 14th International Conference on Salishan Languages (1979)
• 13th International Conference on Salishan Languages (1978)
• 11th International Conference on Salishan Languages (1976)
• 10th International Conference on Salishan Languages (1975)
• 5th Conference on Salish Languages (1970)