On the employment of copies
Academy of Sciences of the GDR, Central Institute of Astrophysics, Potsdam (GDR)
Diverse aspects of the use of copies of photographs in astrophysical measuring techniques are considered, emphasizing the necessity of the preservation of the originals as irretrievable documents carrying the primary information of the astrophysical observation.
P 72. Gerth, E.:
On the employment of copies in astrophotography
ASTROPHOTOGRAPHY. Proceedings of the IAU Workshop, Jena, GDR, April 21-24, 1987, p. 121-124.
Ed. S. Marx, Springer-Verlag Berlin Heidelberg New York London Paris Tokyo
SAO/NASA ADS Astronomy Abstract Service