RT Journal Article SR Electronic T1 Particulate Matter Counting: The Technical Issues JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 2 OP 8 VO 42 IS 1 A1 Knapp, Julius Z. YR 1988 UL http://journal.pda.org/content/42/1/2.abstract AB