TY  - BOOK
ED  - Universitat Kiel
TI  - The IPN: its structure and functions
U1  - 372.35044 23
PY  - 1976///.
CY  - Kiel: 
PB  - Institute for Science Education (West Germany), 
KW  - Science
KW  - Study and teaching (Elementary)
KW  - Germany (West)
ER  -