00343nam a2200145Ia 450000500170000000800410001708200120005810000180007024500200008826000450010830000080015365000120016194200070017399900170018020240821151430.0240821s9999||||xx |||||||||||||| ||und||  a535 ADL  aAdler, Irving 0aSecret of light  aNew YorkbInternational Publishersc1952  a96p  aPhysics  cBK  c23639d23639