000 003810000a22001330004500
008 140223b1962 xxu||||| |||| 00| 0 eng d
041 _aENG
080 _aCum3:N34 K2
082 _aCum3:N34 K2
245 _aREports on progress in physics, ed. by A.C.Stickland.vol 25.
260 _aLondon
_bInst. of Physics and Physical Soci.
_c1962
650 _aPHYSICS
906 _aREPORTS
999 _c224147
_d224147