Rainer Schmidt from Rostock, Germany has compiled a halo bibliography. It contains more than 2600 titles and is available at the following link: ( 1 ).
![Halo bibliography](https://www.ursa.fi/blogi/ice-crystal-halos/wp-content/uploads/sites/9/schmidt2-720x320.jpg)
Rainer Schmidt from Rostock, Germany has compiled a halo bibliography. It contains more than 2600 titles and is available at the following link: ( 1 ).
This is some meticulous work.