PT - JOURNAL ARTICLE AU - Letters TI - LETTERS TO THE EDITOR DP - 1988 Sep 01 TA - PDA Journal of Pharmaceutical Science and Technology PG - 144--146 VI - 42 IP - 5 4099 - http://journal.pda.org/content/42/5/144.short 4100 - http://journal.pda.org/content/42/5/144.full SO - PDA J Pharm Sci Technol1988 Sep 01; 42