TY  - BOOK
AU  - Jones, Bessie Zaban
AU  - Boyd, Lyle Gifford
TI  - harvard college observatory: the first four directorships 1839-1919
U1  - 522.1(744H)(091) 
PY  - 1971///
CY  - Cambridge
PB  - Belknap
KW  - Astronomy
KW  - black holes
KW  - Asteroids
KW  - Astrology
KW  - Astrophysics
KW  - Comets
KW  - Meteorites
KW  - Meteors
KW  - Planetariums
KW  - Planets
KW  - Galaxies
KW  - Constellations
KW  - pulsars
KW  - Solar system
KW  - Physical science
KW  - Universe
KW  - observatory
ER  -