RT Journal Article SR Electronic T1 Letter to the Editor JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 201 OP 201 VO 37 IS 5 A1 Jack Cole A1 Glenn Howard YR 1983 UL http://journal.pda.org/content/37/5/201.abstract AB