Columbia subject headings:
Harvard subject headings:
Agricultural colleges--United States--History--Sources.
Bessey, Charles E. (Charles Edwin), 1845-1915--Archives--Indexes.
Botany--United States--History--Sources.
State universities and colleges--United States--History--Sources.
University of Nebraska (Lincoln campus)--Archives--Indexes.
Princeton subject headings:
Bessey, Charles E. (Charles Edwin), 1845-1915--Manuscripts--Indexes.
Botany--United States--History--Sources--Indexes.