RT Journal Article SR Electronic T1 Environmental Monitoring and Control: Proposed Standards, Current Practices, and Future Directions JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 36 OP 47 VO 51 IS 1 A1 James E. Akers YR 1997 UL http://journal.pda.org/content/51/1/36.abstract AB