TY  - BOOK
AU  - Islam,M.Nurul
TI  - An introduction to sampling methods: theory and applications 
SN  - 9843219767
U1  - 310 21
PY  - 2005///
CY  - Dhaka
PB  - Book world, 
KW  - Methods
N1  - Includes bibliographical references and index
ER  -