What has the author W S Kals written?

W. S. Kals has written:

'Your health, your moods, and the weather' -- subject(s): Physiological aspects, Physiological aspects of Weather, Psychological aspects, Psychological aspects of Weather, Weather

'How to read the night sky' -- subject(s): Astronomy, Observers' manuals

'Stars and planets' -- subject(s): Astronomy, Observers' manuals, Planets, Stars