1 Subjects: “...cost...”

2 Subjects: “...total cost of ownership...”

3 Subjects: “...Weeds / Control / Costs...”

4 Subjects: “...product life cycle cost...”

5 Subjects: “...life-cycle costing...”

6 Subjects: “...cost of energy...”

7 Subjects: “...cost analysis...”

8 Subjects: “...environmental cost accounting...”

9 Subjects: “...cost and benefit sharing...”

10 Subjects: “...cost...”

11 Subjects: “...ecological costs...”

12 Subjects: “...ecological costs...”

13 Subjects: “...ecological costs...”