2 matching record(s)
D (Open Shelf) altHellman, C. Doris
"The Role of Measurement in the Downfall of a System: Some Examples from Sixteenth Century Comet and Nova Observations"
in Arthur Beer (ed.), Vistas in Astronomy, vol. 9, 1967, pp. 43-52. (Part of the Hamburg Symposium, 1964).
[1969-41]
1967
file Q (Stack)Hellman, C. Doris
"George Graham: Maker of Horological and Astronomical Instruments"
photocopy of offprint from Popular Astronomy, vol. XXXIX no. 4, April 1931, separately paginated (1-14). [Very poor copy].
[Unknown]
1931