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A Place for Zero
by LoPresti, Angeline Sparagna; Hornung, Phyllis
ISBN: 9781570911965
Copyright:
Paperback
What's Your Angle, Pythagoras?
by Ellis, Julie; Hornung, Phyllis
ISBN: 9781570911507
Pythagoras and the Ratios A Math Adventure
by Ellis, Julie; Peacock, Phyllis Hornung
ISBN: 9781570917769