TY  - BOOK
TI  - About time clocks and calendars
AV  - KIT ABO 1989
PY  - 1982///
CY  - U. S. A
PB  - Developmental Learning Materials
KW  - Time--Teaching cards
KW  - Calendar--Teaching cards
KW  - Clocks--Teaching cards
N1  - w/ teachers manual
ER  -