TY  - GEN
AU  - Leedy,Paul D.
TI  - Practical research: planning and design 
SN  - 0023692421
U1  - 001.42 
PY  - 1989///
CY  - New York, London
PB  - Macmillan, Collier Macmillan
KW  - Research
KW  - Methodology
N1  - distributer: al-Ahram; Includes bibliographies and index; catalogued by: wessam
ER  -