Columbia subject headings:
Information storage and retrieval systems--Agriculture.
Information storage and retrieval systems--Biology.
Libraries--Automation.
National Agricultural Library (U.S.)
Harvard subject headings:
Information storage and retrieval systems--Agriculture
Information storage and retrieval systems--Biology
Libraries--Automation
National Agricultural Library (U.S.)
Princeton subject headings:
Information storage and retrieval systems--Agriculture.
Information storage and retrieval systems--Biology.
Libraries--Automation.
National Agricultural Library (U.S.)