http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Pruning & training landscape plants / prepared by Robert E. Moon, former extension landscape horticulturist, and Everett Janne, extension landscape horticulturist
The United States Department of Agriculture cooperating.
B (Texas Agricultural Extension Service) ; 1347 [1982 revision]