TY - JOUR T1 - Penicillin Levels in Sputum JF - Thorax JO - Thorax SP - 219 LP - 225 DO - 10.1136/thx.20.3.219 VL - 20 IS - 3 AU - F. F. Hafez AU - Sheila M. Stewart AU - M. Eileen Burnet Y1 - 1965/05/01 UR - http://thorax.bmj.com/content/20/3/219.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -