TY  - GEN
AU  - Snell, Chester Arthur
AU  - Snell, Cornolia T
AU  - Snell, Fester Dee
TI  - Colorimetric methods of analysis: V  II A including photometric methods
U1  - 543.  085 2 COL.02,1 
CY  - NewJersey, D van nostrand co. Inc, princeton
KW  - Colorimetric methods/photometric methods
ER  -