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 142 VO 36 IS 3 A1 Nickel, Ronald O. YR 1982 UL http://journal.pda.org/content/36/3/142.abstract AB