Mountaineers Annuals Online
The years refer to the years covered by the annual, not the date it was published (which was usually the following year). For certain periods, such as 1957 to 1970, the most prominent date printed on the annual was the publication date, although it was not referred to as such, and thus there can easily be confusion over which issue a file is referring to. After 1970, the dates given were usually clearly labeled as the publication date (or the years covered for the final issues from 1983 and on).