ساعه رمليه. الكتابة من حجرة ساعة رملية

III: Mathematics and the Sciences of the Heavens and the Earth	The University of Chicago Press
The History and Practice of Ancient Astronomy	Ohio: The World Publishing Company

كيفية صنع ساعة رملية

Islamic Technology: An Illustrated History.

ساعة رملية: History of the Hour: Clocks and Modern Temporal Orders
الكتابة من حجرة ساعة رملية: The Water Clock in Babylonian Astronomy"
ساعة رملية GIF: "Time and Its Measurement: From the stone age to the nuclear age"

37 1 :35 - 61	Chicago: The University of Chicago Press
I: Time Measuring Instruments; Part 3: Water-clocks, Sand-glasses, Fire-clocks	Bulletin of the Astronomical Society of India

Electronic Journal of Vedic Studies.