Unknown Author
Frederik Muller & Cie.
Anton Michael Scheuhammer
Yves Moelo
Quinn, Michael A.
Abigail F. Cantor
Ravich, I͡U. I.
Anthony G. White
Harry Arthur Waldron
D. Pavlov
National Research Council. Committee on Lead in the Human Environment.
John H. Blake
J. M. Ratcliffe
Canada. Environment Canada
D. E. C. King
National Research Council (U.S.). Committee on Measuring Lead in Critical Populations.
Herbert L. Needleman
Gaspé Lead Mining Company.