27.
28.
29.
31.
How the Arabs Invented Algebra The History of the Concept of Variables
by Downey, Tika
ISBN: 9780823989867
List Price: $23.95
32.
How the Arabs Invented Algebra The History of the Concept of Variables
by Downey, Tika
ISBN: 9780823988792
List Price: $10.00
33.
History of Zero Exploring Our Place-Value Number System
by Downey, Tika
ISBN: 9780823989829
List Price: $23.95
34.
History of Zero Exploring Our Place-Value Number System
by Downey, Tika
ISBN: 9780823988693
List Price: $10.00
35.
Texas: el Estado de la Estrella Solitaria (Texas: the Lone Star State)
by Downey, Tika
ISBN: 9781725315570
List Price: $8.25