RT Journal Article SR Electronic T1 The USP Monographs on Biological Indicators JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 80 OP 83 VO 39 IS 2 A1 Murray S. Cooper YR 1985 UL http://journal.pda.org/content/39/2/80.abstract AB