TY  - BOOK
AU  - JAYASURIYA (J E)
TI  - Statistical calculation for teachers
U1  - 311/30 
PY  - 1955///
CY  - Madras
PB  - Macmillan & Co. Ltd.
KW  - teachers
KW  - Statistical
KW  - for
KW  - calculation
ER  -