Daily: 10 A.M.–5 P.M.
Closed on Tuesdays
1151 Oxford Road
San Marino, CA 91108
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[Douglas G. O'Brien {Corning Glass Center}; G. J. Odgers; Stephen O'Donnell {& Irving D. Hirschfield}; Ruth Oedin; Richard Ogden; Yngve öhman {c.ltr HWBabcock to Yö}; J. B. Oke; Frank O'Malley; Jan H. Oort {incl c.ltr JWB to JHO; c.ltr JHO to Henry T. Heald; c.ltr WCMiller to JHO}; P. Th. Oosterhoff; Optical Society of America {Wallace R. Brode}; Dwayne Orton {Think magazine}; Mabel Romero de Osnovikoff; Donald E. Osterbrock]
Bowen
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Additional Formats
[G. J. Odgers; Office of Naval Research; Sozo Okada {Tokyo Cinema Co., Inc.}; Jan H. Oort {c.ltr JHO to GMünch; memo GMünch to ISB}; Pieter Theodorus Oosterhoff {incl c.ltr Elizabeth P. Lam to ISB}; Donald E. Osterbrock]
Bowen
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Additional Formats
[Claus Oesterwinter; Alfred Olmstead; Jan H. Oort {incl ltr OStruve to ISB; c.ltr OStruve to JHO}; P. Th. Oosterhoff {incl memos on project for a European observatory in southern hemisphere}; Donald E. Osterbrock{incl ltr ISB to MLHumason; ltr ISB to GOAbell}]
Bowen
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Additional Formats
[Madeline Ochsé; G. J. Odgers {incl ltr RMPetrie to ISB; ltr GJO to OCWilson; c.ltr OCWilson to GJO}; John L. Odom; Office of Naval Research; Yngve öhman {incl c.ltr HWBabcock to Yö}; Jan H. Oort {incl c.ltr JHO to CPH}; P. Th. Oosterhoff; Ygnacio A. Ortiz {folded}; T. G. Ostrom]
Bowen
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Additional Formats
[Much of this concerns Baade's papers. Incl ltr P. Th. Oosterhoff to ISB; ltr ISB to JWB; c.ltr JWB to JHO; c.ltr WJBerkebile to Margaret Scherer; c.ltr KRH to JHO; c.2 ltrs JHO to James G. Baker; c.ltr JGBaker to JHO]
Bowen
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Additional Formats
[Oberlin College Development Program {Walter K. Bailey}; D. O'Connell; Frederick J. O'Connor; Jan H. Oort {incl c.ltr JHO to BLindblad}; Robert R. Oppel; Thomas H. Osgood; John Osterberg {incl ltr JO to LAD}; Oxford University Press {Richard O. Paterson}]
Bowen