Leonard
Source: "Leonard Bibliography." Author Wars, https://authorwars.com/authors/leonard.html".
Titles:
Interior Art
- Unknown. The Annihilator Comes
- Unknown. The Bat-Men of Mars (Part 2 of 3)
- Unknown. The Heat Ray
- Unknown. The Island of the Giants
- Unknown. The Mutiny in Space
- Unknown. The Time Ray of Jandra
- Unknown. The Torpedo Terror
- Unknown. The War of the Great Ants
- Unknown. Women with Wings
- 1930. Within the Planet