Elementary science by grades ... a nature study and science reader,
Persing, Ellis C.
Elementary science by grades ... a nature study and science reader, by Ellis C. Persing ... and Elizabeth K. Peeples ... colored illustrations by R. Bruce Horsfall. - New York, D. Appleton and company [c1928-30] - 6 v. fronts. (v.2-3) illus. (part col.) col. plates. 20 cm. - Elementary science by grades. .
"Edited by F. W. Ballou." Books 2-6 have subtitle: A nature study and science reader.
e 29000173
Science--Juvenile literature.
Readers--Science.
Q161 / .P45
Elementary science by grades ... a nature study and science reader, by Ellis C. Persing ... and Elizabeth K. Peeples ... colored illustrations by R. Bruce Horsfall. - New York, D. Appleton and company [c1928-30] - 6 v. fronts. (v.2-3) illus. (part col.) col. plates. 20 cm. - Elementary science by grades. .
"Edited by F. W. Ballou." Books 2-6 have subtitle: A nature study and science reader.
e 29000173
Science--Juvenile literature.
Readers--Science.
Q161 / .P45