RT Journal Article SR Electronic T1 Good Validation Practices: FDA Issues JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 221 OP 223 VO 48 IS 5 A1 Levchuk, John W. YR 1994 UL http://journal.pda.org/content/48/5/221.abstract AB