TY  - BOOK
AU  - Kate Adriaan ten
TI  - Measuring nominal and effective protection
SN  - 0 566 05239 3
U1  - X:531.74.N8, M7 
PY  - 1987///
CY  - Aldershot
PB  - Avebury          
KW  - Protection
N1  - Bibliography: P 188-91
ER  -