References and Bibliography. 


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4-   SN Search Charts, Alvarez.
5-   Find A Supernova, Salmi.
6-   Deep Space CCD Atlas:North, By John Vickers.
7-   Hubble Atlas of Galaxies.
8-   Revised Shapley-Ames Catalog: Carnegie Institution,
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16a- How To Observe Comets, by J. Bortle, (Sky and Telescope,
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17-  Megastar: Electronic Sky Program
18-  The Guide, Project Pluto: Electronic Sky Program
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