TY  - BOOK
TI  - Machines And How They Work
SN  - 069004299X; 0690043007 (lib. bdg.);
AV  - TJ147  .W428 1983
PY  - 1983///
CY  - NEW YORK
PB  - Thomas Y. Crowell
N1  - includes some bibliographical references and index
ER  -