TY  - BOOK
AU  - Llewellyn, Claire
TI  - How things work: things we make, build and use 
SN  - 1-85434-346-7
AV  - REF 620 TW93 1995
PY  - 1995///
CY  - UK
PB  - Two-Can Pub.
KW  - Machinery
KW  - Design and construction
KW  - Natural history
KW  - Encyclopedias
ER  -