Our world changes.
Contributors: Neuner, Elsie Flint, 1898- joint author.; Bruner, Herbert Bascom, 1892-1974, joint author.; Bradley, John Hodgdon, 1898- joint author.
Series: Adventuring in science,; v. 2
Publisher: Ginn and Company
Published: 1940
Place of publication: Boston; New York [etc.]
Language: eng
Number of pages: 564
Subjects: Science -- Juvenile literature.
Genres: Juvenile literature.
Notes: "Readings in science":  p. 521-529.
"By Samuel Ralph Powers ... Elsie Flint Neuner ... Herbert Bascom Bruner ... and John Hogdon Bradley."