How do we know?
By: by Wilbur L. Beauchamp, Gertrude Crampton, and William S. Gray.
Contributors: Crampton, Gertrude, 1909- joint author.; Gray, William S. 1885-1960, joint author.
Series: Basic studies in science : Curriculum foundation series.  Book C.
Publisher: Scott, Foresman and Co.
Published: 1945
Place of publication: Chicago
Language: eng
Number of pages: 96
Subjects: Science -- Juvenile literature
Genres: Juvenile literature.