The Flash of two worlds / writers, Gardner Fox, John Broome (#173) ; penciller, Carmine Infantino ; inkers, Joe Giella, Sid Greene (#170, 173) ; original series covers, Carmine Infantino and Murphy Anderson.
"The birth of the multiverse begins here!"--Jacket flap. Originally issued in 1961-1967 in single magazine form as: The Flash (original series) #123, 129, 137, 151, 170, and 173.
Summary:
"Super-speedsters of two worlds race into adventure in this new collection of tales! Learn how police scientist Barry Allen, The Flash of the 1960s, first crossed paths with his predecessor, Jay Garrick"-- publisher's description.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.