RT Journal Article SR Electronic T1 PDA's Commentary on FDA's “Drug Product Guidance” JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 277 OP 279 VO 50 IS 5 YR 1996 UL http://journal.pda.org/content/50/5/277.abstract AB