RT Journal Article SR Electronic T1 Particulate Measurements: Perspectives JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 184 OP 184 VO 44 IS 4 A1 Julius Z. Knapp YR 1990 UL http://journal.pda.org/content/44/4/184.abstract AB