http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
helping it grow : woodlot owner's guide to helping trees grow : a primer on helping trees grow in the Appalachian region
"Produced to supplement the Woodlot Management: Helping it grow video program."
Includes bibliographical references (page 19).