TY  - BOOK
ED  - American Optical Company.
TI  - Three American microscope builders
PY  - 1945///
CY  - America
PB  - Scientific Instrument division
KW  - Spencer, Charles Achilles
KW  - 1813-1881
KW  - Tolles,Robert B
KW  - 1825-1883
KW  - Spencer, Herbert Ruthven
KW  - 1845-1900
N1  - Open access
ER  -