TY  - BOOK
AU  - Boumphrey,Geoffrey Maxwell
TI  - Engines and how they work
AV  - TJ147 .B68
U1  - 621 
PY  - 1960///]
CY  - New York
PB  - F. Watts
KW  - Mechanical engineering
KW  - Juvenile literature
UR  - http://www.archive.org/details/engineshowtheywo00boum
UR  - http://www.openlibrary.org/books/OL5798150M
ER  -