TY  - BOOK
AU  - Hanna,Lavone Agnes
AU  - Potter,Gladys L
AU  - Hagaman,Neva
TI  - Unit teaching in the elementary school: social studies and related sciences
PY  - 1955///
CY  - Rinehart and Winston, New York
PB  - Holt
KW  - Education, Elementary
KW  - Curricula
ER  -