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 150 OP 151 VO 47 IS 4 A1 Nash, R. A. YR 1993 UL http://journal.pda.org/content/47/4/150.abstract AB