Silverman, L., Billings, C. E., & First, M. W. (1971). Particle size analysis in industrial hygiene. Academic Press. https://doi.org/10.1016/B978-0-12-643750-8.X5001-4

Silverman, Leslie, Charles E. Billings, and Melvin W. First. Particle Size Analysis in Industrial Hygiene. New York: Academic Press, 1971. https://doi.org/10.1016/B978-0-12-643750-8.X5001-4.

Silverman, Leslie, et al. Particle Size Analysis in Industrial Hygiene. Academic Press, 1971. https://doi.org/10.1016/B978-0-12-643750-8.X5001-4.