Claire Aldridge, Glenn E. Croston, and the staff of Kaplan, Inc. By Claire Aldridge, Glenn E.Croston and the Staff of Kaplan, Inc. By Claire Aldridge,Ph.D.,Glenn E.Croston,Ph.D.and the staff of kaplan,Inc. By Claire Aldridge and the Staff of Kaplan, Inc. Robert Stanton and the staff of Kaplan, Inc.