1. Water Treatment, Grade 2 WSO (Required)
    ISBN: 9781625761248
    Author: Pizzi
    Estimated Price: $99.00 (new)
    New Retail Price: 99.00, Used Retail Price: 74.25, New Rental Fee: 64.35, Used Rental Fee: 39.60.
  2. Water treatment grade 1 (Required)
    ISBN: 9781625761231
    Author: Pizzi
    Estimated Price: $89.00 (new)
    New Retail Price: 89.00, Used Retail Price: 66.75, New Rental Fee: 0.00, Used Rental Fee: 26.70.