Worlds of If

Formerly If. The last issue was a revival as a semi-professional magazine.

Publishers:

• UPD Publishing Corp.; New York, Mar '72 - Nov '74
• STF Corporation; Hicksville, NY, Sep '86

Worlds of If

• 1972: Mar/Apr; May/Jun; Jul/Aug; Sep/Oct; Nov/Dec
• 1973: Jan/Feb; Mar/Apr; May/Jun; Jul/Aug; Sep/Oct; Nov/Dec
• 1974: Jan/Feb; Mar/Apr; May/Jun; Jul/Aug; Sep/Oct; Nov/Dec
• 1986: Sep/Nov