Gerald North

Observing the Moon

2014

Advanced amateur astronomy

2012

Observing the solar system

2012

Astronomy in depth

2012

Astronomy explained

2012

Observing Variable Stars, Novae and Supernovae

2004

Observing comets

2013

Mastering Astronomy

1988

Mastering Astronomy (Master)

1988

Den Mond beobachten

2012

Den Mond beobachten (German Edition)

2003

Course Work Assignments in General Certificate of Secondary Education Chemistry

1990