TY  - BOOK
AU  - Onyango ,John P
TI  - A textbook of basic statistics 
SN  -  9966463518
AV  - QA271.O59 1987 
PY  - 1987///
CY  - Nairobi, Kenya
PB  - East African Educational Publishers
N1  - reprinted 1991,1995,2005
ER  -