$40
$40 - Principles of Chemistry (Fourth Edition) by Tro
used for: autumn CHEM 31A & winter CHEM 31B
$30 - Geochemistry (Second Edition) by White
used for: autumn EARTHSYS 2
$20 - Calculus (Volume 1) from OpenStax
used for: all year MATH 19-21
$20 - Calculus (Volume 2) from OpenStax
used for: all year MATH 19-21
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