The club yearbooks from 2018 back to 2005 are online and provide a very useful resource for researching and planning trips. In addition, the yearbooks from 2004 to 1992 have online indexes, but you'll need to have a paper copy of those yearbooks to actually read the articles (eventually all of the articles will be moved online).
There are various ways to search the yearbooks, the list of yearbooks by year, with their content pages is here. You can also search for articles by region (e.g. Vanoise, Silvretta, Albula Alps etc) or search through the articles for a specific word or phrase (e.g. to find references to a specific hut).
To access the online yearbooks you need to be a club member and logged into the website.