usga: turfgrass and environmental research online (tero)usgatero.msu.edu/v12/n3-1.pdft328 t419 16...
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http://www.usga.org/course_care/green_section_record/Policies-For-Use-and-Reuse/http://www.usga.org/course_care/green_section_record/Policies-For-Use-and-Reuse/
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http://www.usga.org/course_care/green_section_record/Policies-For-Use-and-Reuse/http://www.usga.org/course_care/green_section_record/Policies-For-Use-and-Reuse/
- http://www.usga.org/course_care/green_section_record/Policies-For-Use-and-Reuse/http://www.usga.org/course_care/green_section_record/Policies-For-Use-and-Reuse/