000 002850000a22001210004500
080 _a539.1
_bC7
100 _aCrowther, James Arnold
245 _aIons, electrons and ionizing radiations
250 _a8th ed.
260 _aLondon
_bEdward Arnold
_c1949
300 _a322p.
942 _cBK
999 _c51976
_d51976