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 50 OP 50 VO 35 IS 2 A1 Anisfeld, Michael H. YR 1981 UL http://journal.pda.org/content/35/2/50.abstract AB