TY  - BOOK
AU  - PASACHOFF,JAY M.
AU  - PERCY,JOHN R.
TI  - THE TEACHING OF ASTRONOMY / 
U1  - 520 
PY  - 1990///
CY  - [S.N] : 
PB  - CAMLRIDGE UNIVERSITY PRESS ، 
KW  - ASTRONOMY
KW  - PLANETARIUMS
ER  -