David Sang
About me: David Sang is the author of over 100 textbooks used in secondary schools around the world. He was a research physicist at Leeds University for nine years before turning to teaching. He has taught Physics in a high school, a sixth-form college and a university.
-16%
Original price was: $70.00.$59.00Current price is: $59.00.
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Original price was: $100.00.$89.00Current price is: $89.00.
