Chicago, Illinois: Atomic Scientists of Chicago 1948-1957. First Edition. Stapled wrappers. 8 1/2 x 11 inches. Colored wrappers (various colors) printed in black and white. Generally very good or better, from the library of artificial intelligence scientist Ray J. Solomonoff, with occasional notations by Solomonoff (and in some cases his mailing label).
1948: Mar, Apr only. Vol 4 (2 of 12 issues)
1949: Nov, Dec only. Vol 5 (2 of 12 issues)
1950: Mar, Apr, May, Jun, Oct, Nov, Dec. Vol 6 (7 of 12 issues)
1952: Feb, Mar only. Vol 8 (2 of 12 issues)
1953: Apr, May, Jun, Jul, Sep, Oct, Nov, Dec (Vol 9, 8 of 10 issues - not issued in Aug)
1954: Jan, Feb, Mar, Apr, May, Jun, Sep, Oct, Nov, Dec (Vol 10, 10 issues, complete - not issued in Jul/Aug)
1955: Jan, Feb, Mar, Apr, May, Jun, Sep, Oct, Nov, Dec (Vol 11, 10 issues, complete - not issued in Jul/Aug)
1956: Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec (Vol 12, 9 of 10 issues)
1957: Jan, Feb, Mar, Apr, May, Jun, Sep, Oct, Nov, Dec (Vol 13, 10 issues, complete - not issued in Jul/Aug)
A total of 60 issues. NOTE: This periodical was published monthly until Volume 9, when it went to 10 annual issues instead of 12. (Jul & Aug hiatus). Very Good. Wraps. 
It is difficult to put together significant runs of this Bulletin as there are many interested in its contents, particularly in the early years.
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(publication data from March 1948 issue)