TY - RPRT TI - Observed changes in phenology across the USA: A regional review for the 2013 National Climate Assessment, Pacific Northwest Regional Information Sheet AU - Stacey A. Leicht-Young AU - Carolyn A.F. Enquist AU - Jake F. Weltzin PY - 2013 UR - https://pubs.usgs.gov/publication/70045183 ID - 70045183 ER -