00538nam a2200205Ia 450000500170000000800410001702000180005804100080007608200090008410000170009324500500011025000060016026400430016630000260020965000060023565500140024170000230025570000250027870000290030320260922095439.0260922s9999    xx            000 0 und d  a0-7166-6303-1  aeng  a032.1 aBARCLAY, Sue10aInvestigating Light 12b: Young Scientist 12   a0  aLondonbWorld Book Internationalc1994  a62 hlm.bilus.c27 cm 4a0  aGrade 7-91 aDavid Cookeauthor1 aJeremy Gowereauthor1 aRichard Deverelleauthor