O -- MISCELLANEOUS [25]

[Charles Robert O'Dell {incl ltr DEOsterbrock to ISB; ltr ISB to DEOsterbrock}; Thomas J. O'Donnell {corresp re Michelson's papers & artifacts}; Office of Naval Research; Rev. W. E. R. O'Gorman; Douglas C. Ogilvie; Oldbourne Press {P. Coxhead}; Ronald D. Olmsted; Edward Olson; Optical Society of Southern California {Ralph E. Hendrickson}; Frederick I. Ordway, III; Donald E. Osterbrock]