Ruben Bolling alerted me to this cool website. You enter a month and year, and it will return a page of thumbnail images of all the comic books that were available on newsstands for that month. Above, a few of the comic books available in February 1973, the month that I first became seriously interested in comic books, mainly because I discovered Jack Kirby's Kamandi.
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects