00331nam a2200121Ia 4500008004100000082001900041245003400060260002900094650002800123650001800151650001900169700002100188220204s9999    xx            000 0 und d  a577.334bPRY.1 0aFree radicals in biology. V 1  aNew YorkbAcademicc1976  aElectron spin resonance  aFree radicals  aSpin labelling  aPRYOR, William A