Editors

No. 1, 1968 -- No. 2, 1970 -- Lester Del Rey
Winter, 1970-71 -- Spring, 1971 -- Ejler Jakobsson

Publishers

No. 1, 1968 -- Galaxy Publishing, 421 Hudson Street, New York, NY
No. 2, 1970 -- Universal Publishing, 235 East 45 Street, New York, NY
Winter, 1970-71 -- Spring, 1971 -- UPD Publishing, 235 East 45 Street, New York, NY