The Magazine of Fantasy and Science Fiction

1949: Fall (fsf-1949.jpg)
1950: Winter/Spring (fsf-1950Q1.jpg), Summer (fsf-1950Q2.jpg)
      Fall (fsf-1950Q3.jpg), Dec (fsf-1950Q4.jpg)
1951: Bimonthly (Feb, Apr, Jun, Aug, Oct, Dec)
1952: Feb, Apr, Jun, Aug, Sep, Oct, Nov, Dec
1953- Monthly with double Oct/Nov issues starting in 1992