The Clarence E. Mulford Story
by Bernard A Drew
Scarecrow Press, 1991, ISBN: 0-8108-2516-3, hardback issued without dustjacket.
Bibliography and Biography of Clarence E. Mulford, best known as the creator of Hopalong Cassidy. Also discusses how the last four books written, featuring the character Hopalong Cassidy, were written by Louis L'Amour under the pen-name of Tex Burns.