On-sale date as per copyright date.
Writer credit as per page 141 Gaylord Du Bois's Account Books compiled by Randall W. Scott; Writer credit as per page 105 Catalog of Copyright Entries 1950 Pamphlets, Serials Etc. Jan-Dec 3D Ser Vol 4 Pt 1B.
Zu = Bug; Za-Dak-Lul = Ocean; Zugor = Roar; Zu-Kut = Cave; Zut = Out; Zu-Vo = Strong.
Colored in black and red.