Κανονική προβολή Προβολή MARC Προβολή ISBD

The IPN : its structure and functions. - 2nd rev. ed. - Kiel: Institute for Science Education (West Germany), 1976. - 82 p. ; 21 cm. - 11 .

Subjects--Topical Terms:
Science--Study and teaching (Elementary)--Germany (West)

Dewey Class. No.: 372.35044