TY - JOUR T1 - An experiment with an advance letter of an interview inquiry. JF - British Journal of Preventive & Social Medicine JO - Br J Prev Soc Med SP - 241 LP - 243 DO - 10.1136/jech.23.4.241 VL - 23 IS - 4 AU - A Cartwright AU - W Tucker Y1 - 1969/11/01 UR - http://jech.bmj.com/content/23/4/241.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -