From DC
"A stunning Golden Age Archive featuring the adventures of Captain Marvel, Jr. and the origin of Mary Marvel from MASTER COMICS 23-32, CAPTAIN MARVEL JR. #1 and CAPTAIN MARVEL ADVENTURES #18! Plus, a foreword by comics historian PFrom DC .C. Hamerlinck."
I'd recommend getting the Shazam Family Annual 1953 Facsimile (2002) as seen here
http://www.mycomicshop.com/viewissue?IVID=9816981It's got the Mary Marvel origin, and the Black Adam origin......can't recall if it has the Junior origin though, but hey, for 5 or 6 bucks, it's worth it