PT - JOURNAL ARTICLE AU - Spender, M. TI - LETTER TO THE EDITOR DP - 1991 Mar 01 TA - PDA Journal of Pharmaceutical Science and Technology PG - 70--70 VI - 45 IP - 2 4099 - http://journal.pda.org/content/45/2/70.short 4100 - http://journal.pda.org/content/45/2/70.full SO - PDA J Pharm Sci Technol1991 Mar 01; 45