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 100 OP 100 VO 47 IS 3 A1 B. Reeks YR 1993 UL http://journal.pda.org/content/47/3/100.abstract AB