RT Journal Article SR Electronic T1 LETTERS TO THE EDITOR JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 142 OP 143 VO 46 IS 5 A1 T. H. Meltzer YR 1992 UL http://journal.pda.org/content/46/5/142.abstract AB