TY  - BOOK
AU  - Welcher, Frank J.
TI  - Standard methods of chemical analysis: Vol.2 - Industrial and natural products and noninstrumental methods 
U1  - 543 
PY  - 1939///
CY  - New York
PB  - D Van Nostrand Co, Inc
KW  - Chemistry
KW  - Plastics, rubber
KW  - Vitamins,soil,
KW  - Water: biological examination
ER  -