Central, Eastcentral, Eastern, Mideast, Midwest, Northcentral, Northeast, Northwest, Southcentral, Southeast, Southern, Southwest, Westcentral 1st EditionGlen Krutz412 solutions
16th EditionGeorge C. Edwards III, Martin P. Wattenberg, Robert L. Lineberry269 solutions
11th EditionMichael D. Reisig, Todd R. Clear160 solutions
9th EditionChristina Dejong, Christopher E. Smith, George F Cole105 solutions