| http://www.w3.org/ns/prov#value | - Where appropriate, investigators are encouraged to work in association with existing projects, observational networks, long-term ecological research (LTER) sites or research centers, or testing and evaluation facilities, whether supported by NSF or other agencies, such as USEPA, USGS, USDA or NOAA. Collaborations with international researchers is also encouraged, however, international partners ar
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