Columbia subject headings:
Harvard subject headings:
Evergreens, Broad-leaved--Handbooks, manuals, etc.
Ornamental woody plants--Europe.
Ornamental woody plants--Handbooks, manuals, etc.
Ornamental woody plants.
Shrubs--Handbooks, manuals, etc.
Trees--Handbooks, manuals, etc.
Woody plants--Europe.
Woody plants.
Princeton subject headings:
Ornamental woody plants.
Shrubs.
Trees.
Woody plants.