TY  - BOOK
ED  - British Standards Institution
TI  - Specification for envelopes for commercial, official and professional use
T2  - British standard
SN  - 0580160645
PY  - 1987///
CY  - London, United Kingdom
PB  - British Standards Institution
KW  - Design
KW  - Envelopes
KW  - Dimensions
ER  -