00521nam a2200097Ia 4500008004100000100006400041245022800105260002700333650001400360856004900374171212s9999    xx            000 0 und d  aJohnston, William R.;Kaufman, Julia H.;Thompson, Lindsey E.  cJohnston, William R.;Kaufman, Julia H.;Thompson, Lindsey E.aSupport for Instructional LeadershipbSupervision, Mentoring, and Professional Development for U.S. School Leaders: Findings from the American School Leader Panel  bRAND Corporationc2016  aEducation  uhttp://jstor.org/stable/10.7249/j.ctt1d41d7b