00617nam a22002177a 4500 20170124110031.0 565626 00.00 565626 Cen Lib/Ret DPL EN 507 STE Stevens, R.A. 21794 Out of school science activities for young people / by R.A. Stevens Paris UNESCO 1969 De Fontenoy, 75 Paris 7e 129p. 19cm(Hb) Scientific recreations 21795 Science--Study and teaching 4704 ddc EN 507 STE 127873 127873 4 0 0 0 L L 2015-06-30 Cen Lib/Ret 0.00 0 507 STE 565626 2015-06-30 00:00:00 1 0.00 2015-06-30 EN Written off on approval by DLB (By Circulation); dtd 15-06-2023