So that's geology!
By: by R. Ray Baker ; Photographs of Bobby and the Old Professor by E. N. Stanger.
Series: Bobby and the old professor : book 4
Publisher: Reilly & Lee
Published: 1942
Place of publication: Chicago
Language: eng
Number of pages: 128
Subjects: Geology -- Juvenile literature.; Paleontology -- Juvenile literature.
Genres: Juvenile literature.