Columbia subject headings:
Harvard subject headings:
Congresses and conventions--Bibliography.
Learned institutions and societies--Bibliography--Union lists.
Periodicals--Bibliography--Union lists
Science--Periodicals--Bibliography.
Princeton subject headings:
Congresses and conventions--Bibliography.
Learned institutions and societies--Bibliography--Union lists.
Periodicals--Bibliography--Union lists.
Science--Periodicals--Bibliography.
Union catalogs.