PT - JOURNAL ARTICLE AU - GOLD, Daniel H. TI - Validation: Why, What, When, How Much DP - 1996 Jan 01 TA - PDA Journal of Pharmaceutical Science and Technology PG - 55--60 VI - 50 IP - 1 4099 - http://journal.pda.org/content/50/1/55.short 4100 - http://journal.pda.org/content/50/1/55.full SO - PDA J Pharm Sci Technol1996 Jan 01; 50