My original tumblr post was here. This is Super-Science Fiction #3 (April 1957) with a cover by Frank Kelly Freas. The cover promotes ‘Pariah Girl’ by Boyd Ellanby; ‘The Rim of Eternity,’ by Koller Ernst; ‘Invulner able,’ by Harlan Ellison; and ‘One Woman for Venus,’ by Wiston Marks. It was first posted on tumblr by Pulp Covers.