Box-folder 79:21

Scope and Contents From the Sub-Series: Files pertaining to conferences and inter-institutional projects, including the Mars Committee organized by Lowell Observatory to coordinate observation during the oppositions of 1954 and 1956. Contains correspondence, programs, trip reports, and notes, as well as the paper on atmospheric seeing read by Tombaugh at a conference in Columbus, Ohio, in 1953. Arranged alphabetically.