00409nam a2200157Ia 4500003000500000005001700005008004100022020001900063040000900082082001700091100002200108245004400130260002600174300002300200500002800223322820220902110334.0210816s9999    xx            000 0 und d  a9780799345216"  c3228  aJ 507.8 VAND  aVan der Walt,Rosa 0aMy Eksperimente-BoekcVan der Walt,Rosa  aPretoriabLapa c2009  a103 pages c27 cm   aincludes illustrations