1 Subjects: “...Washington (State)...”

2 Subjects: “...Zone of aeration / Washington (State)...”

3 Subjects: “...Forest regeneration / Washington (State)...”

4 Subjects: “...Drug abuse / Washington (State) / Seattle / Evaluation / Methodology...”

5 Subjects: “...Chemistry, Analytic / Study and teaching (Higher) / Washington (State) / Seattle...”