00690nam a2200205 i 4500 240202s1973 xx a 001 0 und d 92-3-101058-1 pbk. GCL UNESCO 507 New Unesco Source Book For Science Teaching / UNESCO United nations Educational Scientific and cultural organization , France : 1973. 270 pages : Illustrations ; 24 cm. text txt rdacontent unmediated n rdamedia Volume nc rdacarrier includes index. Education United nations Educational Scientific and cultural organization ddc 0 0 ddc 0 507_000000000000000_UNESCO 0 2523 LPL LPL 2024-02-02 0 507 UNESCO 5064 2024-02-02 13:00:30 2024-02-02 BK BK BK 1824 1824