"August 2001."Shipping list no.: 2002-0138-P.Cover title.Mode of access: Internet
Cover title."December 1984"--T.p. verso."CANUSA, Canada/United States Spruce Budworms Program"--T.p....
Shipping list no.: 85-1090-P.Caption title.Bibliography: p. [8].Mode of access: Internet
"November 1999"--P. [2].Shipping list no.: 2000-0084-P."U.S. National Arboretum plant introduction"-...
"September 2001."Shipping list no.: 2002-0138-P.Cover title.Mode of access: Internet
"August 2001."Shipping list no.: 2002-0138-P.Cover title.Mode of access: Internet
Shipping list no.: 90-217-P.Caption title.Includes bibliographical references (p. 13).Mode of access...
"August 2001."Shipping list no.: 2002-0138-P.Cover title.Mode of access: Internet
"December 1985."Shipping list no.: 86-67-P.Caption title.Bibliography: p. 12-13.Mode of access: Inte...
Shipping list no.: 91-450-P.Caption title.Includes bibliographical references (p. 11).Mode of access...
"November 1999"--P. [2].Shipping list no.: 2000-0084-P."U.S. National Arboretum plant introduction"-...
"September 1989"--P.[1] revised?"April 1988"--P. [1].Shipping list no.: 88-588-P.Caption title.Mode ...
"November 1999"--P. [2].Shipping list no.: 2000-0084-P."U.S. National Arboretum plant introduction"-...
Shipping list no.: 2000-0084-P."November 1999"--P. [2]."U.S. National Arboretum plant introduction"-...
Shipping list no.: 2002-0138-P."August 2001."Cover title.Mode of access: Internet
"November 1999"--P. [2].Shipping list no.: 2000-0084-P."U.S. National Arboretum plant introduction"-...
Cover title."December 1984"--T.p. verso."CANUSA, Canada/United States Spruce Budworms Program"--T.p....
Shipping list no.: 85-1090-P.Caption title.Bibliography: p. [8].Mode of access: Internet
"November 1999"--P. [2].Shipping list no.: 2000-0084-P."U.S. National Arboretum plant introduction"-...
"September 2001."Shipping list no.: 2002-0138-P.Cover title.Mode of access: Internet
"August 2001."Shipping list no.: 2002-0138-P.Cover title.Mode of access: Internet
Shipping list no.: 90-217-P.Caption title.Includes bibliographical references (p. 13).Mode of access...
"August 2001."Shipping list no.: 2002-0138-P.Cover title.Mode of access: Internet
"December 1985."Shipping list no.: 86-67-P.Caption title.Bibliography: p. 12-13.Mode of access: Inte...
Shipping list no.: 91-450-P.Caption title.Includes bibliographical references (p. 11).Mode of access...
"November 1999"--P. [2].Shipping list no.: 2000-0084-P."U.S. National Arboretum plant introduction"-...
"September 1989"--P.[1] revised?"April 1988"--P. [1].Shipping list no.: 88-588-P.Caption title.Mode ...
"November 1999"--P. [2].Shipping list no.: 2000-0084-P."U.S. National Arboretum plant introduction"-...
Shipping list no.: 2000-0084-P."November 1999"--P. [2]."U.S. National Arboretum plant introduction"-...
Shipping list no.: 2002-0138-P."August 2001."Cover title.Mode of access: Internet
"November 1999"--P. [2].Shipping list no.: 2000-0084-P."U.S. National Arboretum plant introduction"-...
Cover title."December 1984"--T.p. verso."CANUSA, Canada/United States Spruce Budworms Program"--T.p....
Shipping list no.: 85-1090-P.Caption title.Bibliography: p. [8].Mode of access: Internet
"November 1999"--P. [2].Shipping list no.: 2000-0084-P."U.S. National Arboretum plant introduction"-...