Don Markstein’s Toonopedia. What I did know before reading Markstein was the original concept for the character, that he was a regular guy, Roger Drum, who crash landed into a lost jungle world of dinosaurs and prehistoric dangers, was watered down and subsequent to the first issue Thun’da became just another white jungle character.
The cringe-worthy cover and depictions of black cannibals with filed teeth is from that era when some artists, editors and publishers didn’t see anything wrong with that sort of racial caricature. Be warned.
Thun’da #1 has been reprinted several times. I have two of the reprints. In the seventies Russ Cochran did a beautiful oversized edition on heavy art paper, reproduced from the original art. I have that one, as well as an equally outstanding 1987 edition in a color comic book format by Fantagraphics. My scans today are taken from the original comic, published in 1952.
Since Frazetta assisted other artists, like Al Williamson, did Williamson (and other artists) help Frazetta with the artwork? More of my ignorance. I don’t know.
In the blackline ad page on the inside back cover, in 1952 you could order a switchblade knife through the mail (for $1.65). That changed in 1958. I am quoting from Wikipedia: “In the USA, switchblades remain illegal to import from abroad or to purchase through interstate commerce since 1958 under the Switchblade Knife Act (15 U.S.C. §§1241-1245).” Take that, Jets and Sharks!