Reference
- Brandt , A. D. 1947 . Industrial Health Engineering , 78 New York : John Wiley & Sons, Inc. .
- Stead , F. and Taylor , G. 1947 . Calibration of Field Equipment From Air Vapor Mixtures in a Five-Gallon Bottle . J. Ind. Hyg. and Tox. , 29 ( 6 ) November : 408