ISBN 1570912505 books & textbook
Exploring Time: Sundials, Water Clocks, and Pendulums : Science Journal (Aries, Astronomy-Based Physical Science)
Grossman, Marvin C. Shapiro, Irwin I. Ward, R. Bruce
Charlesbridge Pub Inc / Paperback
isbn-10: 1570912505 / isbn-13: 9781570912504
