#1
January 1, 1952 • Physical Book • 111 Readers • 244 pages • 4
#2
August 30, 1951 • Physical Book • 295 Readers • 255 pages • Format Kindle Edition • Info Revised edition • 4
#3
July 1, 1969 • Physical Book • 677 Readers • 352 pages • Format Paperback • 3.8
#4
June 1, 1965 • Physical Book • 71 Readers • 577 pages • Format Paperback • Info 50th Anniversary Edition • 4.3