TY  - BOOK
AU  - Burstall, Aubrey F
AU  - 
TI  - Simple working models of historic machines
U1  - 621.001.57 
PY  - 1968///
CY  - London
PB  - Edward Arnorld
KW  - machine models
KW  - working models of machines
KW  - mechanical models
KW  - historic machines
KW  - models of machines
ER  -