Reference
- Special glass cylinders, similar to Scientific Glass Apparatus Company (Bloomfield, New Jersey) catalog No. J-556. but made of 2.5 mm. Pyrex glass. Inside diameter 45 mm., net inside height 200 mm. “No-lube” joint to be 46/12 with stopper hollow but with solid bottom. (Refer to correspondence of June 15 and June 29, 1989, with Virginia State Department of Health.)
- Bamback , K. 1939 . Determination of lead by dithizone. Modifications and improvements of the Hubbard-Clifford-Wickmann method as applied to biological material . J. Ind. Eng. Chem., Anal. Ed. , 11 : 400 – 403 .
- Ruf , H. W. 1940 . Studies on the lead hazards in certain phases of printing, I. Actual lead exposures as measured by the amount of lead in printing atmospheres . J. Ind. Hyg. & Tox. , 22 : 445 – 463 .