Back to the Stone Age (Pellucidar No. 5)

	Publisher	Edition	Serial No.	Date	Pp.	Price	Cover Artist
	Ace	1	F-245	November 1963	221	40¢	Roy G. Krenkel & Frank Frazetta
	Ace	2	G-737	1968	221	50¢	Roy G. Krenkel & Frank Frazetta
	Ace	3	04631	1969	221	60¢	Roy G. Krenkel & Frank Frazetta
	Ace	4	04632	January 1973	251	75¢	Frank Frazetta
	Ace	5	04633	1973	251	95¢	Frank Frazetta
	Ace	6	04634	1975	251	$1.25	Frank Frazetta
	Ace	7	04635	1976	251	$1.50	Frank Frazetta
	Ace	7	04636	August 1978	251	$1.95	Frank Frazetta
	Ace	8	04637	January 1982	251	$2.25	Frank Frazetta
	Ace	9	04638	May 1985	251	$2.75	Frank Frazetta
	Tandem	1	13186	1974	222	35p	Chris Achilleos
	Del-Rey	1	36671	May 1990	230	$3.95	David B. Mattingly
	Bison Books	1	0-8032-6263-8	June 2007	336	$21.95	John Coleman Burroughs
Introduction by Gary Dunham