<p>What's the difference between these 3:</p>
<p>Neuhauser
Calculus F/ Biol & Medicine (2nd)</p>
<p>Neuhauser
Calculus F/ Biol & Med (2nd) Pkg W/rev Ssm</p>
<p>Neuhauser
Sm Calculus F/ Biol & Medicine (2nd) Rev</p>
<p>what is the Rev?? Does anyone know whether a paperback version is acceptable?</p>