TY - JOUR T1 - Letter to the Editor JF - PDA Journal of Pharmaceutical Science and Technology JO - PDA J Pharm Sci Technol SP - 101 LP - 101 VL - 39 IS - 2 AU - Hans G. Schroeder Y1 - 1985/03/01 UR - http://journal.pda.org/content/39/2/101.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -