TY  - BOOK
AU  - Van Helden,Albert
AU  - Hankins,Thomas L.
TI  - Instruments / : ed. by Albert Van Helden and Thomas L. Hankins
SN  - 0-226-84883-3 
PY  - 1994///
CY  - Philadelphia : 
PB  - Dep. of History and Sociology of Science, 
ER  -