1.
What Einstein Did Not See: Redefining Time to Understand Space
by Sills, Thomas W.
ISBN: 9780964409637
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Science Fun in Chicagoland A Guide for Parents and Teachers, With over 800 Resource Descript...
by Sills, Thomas W., Bradley, ...
ISBN: 9780964409606
List Price: $14.95
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Science Fun in Chicagoland A Guide for Parents and Teachers
by Sills, Thomas W.
ISBN: 9780964409613
List Price: $17.95
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Science Fun With Toys A Guide for Parents and Teachers
by Sills, Thomas W., Iacuzzi, ...
ISBN: 9780964409620
List Price: $17.95