000 00280nam a22001097a 4500
082 0 _a535
100 1 _aBarton A. W.
245 1 2 _aA text book on light
_cA. W. Barton
260 _aLondon :
_bLongmans Green and Company,
_c1939.
300 _a424p. ;
_c22 cm.
650 4 _aVisible light
999 _c393375
_d393311