TY  - BOOK
AU  - Penny,R.K.
AU  - Gibbings,J.C.
TI  - The experimental method: a text for students of engineering and science 
T2  - Introductory engineering series
SN  - 0582443512
PY  - 1974///
CY  - London
PB  - Longman
KW  - Physical measurements
ER  -