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
Green comet not seen in 50,000 years to streak across night sky. Will you be able to view it without a telescope? - silive.com
Comet SWAN Expected to Put on a Splendid Show - Sky & Telescope - Sky & Telescope
See Comet Lemmon at its brightest this week
When and how to see rare green comet traveling close to Earth : NPR
A Bright New Visitor: How to Spot Comet NEOWISE - Sky & Telescope - Sky & Telescope