Smithsonian Institution Office of Policy and Analysis; Doering, Zahava D.; Karns, David A.(Smithsonian Institution, Office of Policy and Analysis, 2005)
Smithsonian Institution Office of Policy and Analysis; Doering, Zahava D.; Karns, David A.(Smithsonian Institution, Office of Policy and Analysis, 2005)
Doering, Zahava D.; Marino, Amy L.; Smithsonian Institution Office of Policy and Analysis(Smithsonian Institution, Office of Policy and Analysis, 2004)
DiGiacomo, Kerry R.; Doering, Zahava D.; Smithsonian Institution Office of Policy and Analysis(Smithsonian Institution, Office of Policy and Analysis, 2001)
Smithsonian Institution Office of Policy and Analysis; Doering, Zahava D.; Smithsonian Institution. Horticulture Services Division; United States Botanic Garden(Smithsonian Institution, Office of Policy and Analysis, 2003)
Smithsonian Institution Office of Policy and Analysis; Doering, Zahava D.; Karns, David A.(Smithsonian Institution, Office of Policy and Analysis, 2006)
Doering, Zahava D.; Pekarik, Andrew J.; Smithsonian Institution Office of Policy and Analysis(Smithsonian Institution, Office of Policy and Analysis, 2002)