"Originally published in single magazine form in Adventure comics 369-380, 403, Action comics 378-387, 389-392, Superboy 172, 173, 176, 183, 184, 188, 190, 191 © 1968-1972."
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Legion of Super-Heroes. Volume 4. ISBN 9781401229412. Published by DC Comics in 2010. Publication and catalogue information, links to buy online and reader comments.
