TY  - BOOK
AU  - Atwood, William H.
AU  - Heiss, Elwood D.
TI  - Educational biology
AV  - QH308 .A72
U1  - 570 
PY  - 1928///]
CY  - Philadelphia
PB  - P. Blakiston's son
KW  - Biology
N1  - Includes bibliographical references and index
ER  -