PT  - JOURNAL ARTICLE
ED  - ,
TI  - The principles and practice of clinical trials
DP  - 1971 Mar 01
TA  - The Journal of the Royal College of General Practitioners
PG  - 166--167
VI  - 21
IP  - 104
4099  - http://bjgp.org/content/21/104/166.2.short
4100  - http://bjgp.org/content/21/104/166.2.full
SO  - J R Coll Gen Pract1971 Mar 01; 21