How to see a bright green comet soar across the night sky | Here & Now
Sky and Telescope, vol. 22, no. 3 (September 1961) (Comet Wilson 1961d, Variable Star Spectroscopist, Stellar Radial Velocities, Filar Micrometer, Meteor Photography with a Light Amplifier): Margaret W. Mayall, Otto Struve, Norman
Viewing Comet NEOWISE in the Early Evening - Lowell Observatory