Science Fantasy Yearbook, [No. 1]

From Author Wars - https://authorwars.com/publications/science-fantasy-yearbook-no-1-302076.html

Overview:

Title: Science Fantasy Yearbook, [No. 1]
Author: uncredited
Year: 1970
Publisher: Ultimate Publishing Co., Inc.
Price: $0.60
Pages: 132
Binding: digest
Type: MAGAZINE
Title Reference: End of Your Rope
Notes: First issue; unnumbered and undated except for the title Science Fantasy Yearbook - 1970 on the cover, and 1970 Science Fantasy Yearbook on the spine. The indicia was simply Science Fantasy.
Issued in the summer of 1970 according to Tymn & Ashley's magazine reference.
Anonymously edited by Sol Cohen.
Info from the NESFA Index to the SF Magazines, 1966-1970.
Miller/Contento notes that the cover is from German Perry Rhodan #74. - Confirmed by JLochhas on 28-May-14.
Month of publication estimated.