TY - BOOK AU - Cohen,Ronald TI - How to grow feet out of your ears when you land on your head: : validity and sampling in an African survey T2 - Paper No.1 - 24 are all bound in one book AV - EAF QTO DT19.9.U57A351970No.13 PY - 1970/// CY - Boston PB - African Studies Association KW - Sampling KW - Distribution KW - Survey ER -