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Detection and Plant Monitoring Programs: Lessons from an Intensive Survey of Asclepias meadii with Five Observers
- Helen M. Alexander,
- Aaron W. Reed,
- W. Dean Kettle,
- Norman A. Slade,
- Sarah A. Bodbyl Roels,
- Cathy D. Collins,
- Vaughn Salisbury
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- Published: December 20, 2012
- https://doi.org/10.1371/journal.pone.0052762