00454nam a2200157Ia 450000500170000000800410001702000180005804100080007608200090008410000200009324500810011326400490019430000330024365000060027665500140028220260922095525.0260922s9999    xx            000 0 und d  a0-691-08534-x  aeng  a530.1 aEHRLICH, Robert10aTurning The World Inside Outb: And 174 Other Simple physics Demonstrations   aNew JerseybPrinceton University Pressc1990  axxvi, 216 hlm.bilus.c24 cm 4a0  aGrade 7-9