PT - JOURNAL ARTICLE AU - Schwartz, R. T. TI - LETTERS TO THE EDITOR DP - 1989 Jan 01 TA - PDA Journal of Pharmaceutical Science and Technology PG - 2--2 VI - 43 IP - 1 4099 - http://journal.pda.org/content/43/1/2.short 4100 - http://journal.pda.org/content/43/1/2.full SO - PDA J Pharm Sci Technol1989 Jan 01; 43