RT Journal Article SR Electronic T1 PDA Comments: USP on Microbiological Evaluation of Clean Rooms and Other Controlled Environments <1116> JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 222 OP 226 VO 51 IS 6 A1 PDA YR 1997 UL http://journal.pda.org/content/51/6/222.abstract AB