RT Journal Article SR Electronic T1 Daily changes in ventilatory capacity in smokers and in non-smokers. JF British Journal of Preventive & Social Medicine JO Br J Prev Soc Med FD BMJ Publishing Group Ltd SP 86 OP 89 DO 10.1136/jech.21.2.86 VO 21 IS 2 A1 G C Carey A1 T A Dawson A1 J D Merrett YR 1967 UL http://jech.bmj.com/content/21/2/86.abstract AB