Columbia subject headings:
Anatomy, Comparative.
Morphology (Animals)
Physiology, Comparative.
Harvard subject headings:
Anatomy, Comparative.
Morphology (Animals)
Physiology, Comparative.
Princeton subject headings:
Anatomy, Comparative--Periodicals.
Morphology (Animals)--Periodicals.
Periodicals.
Physiology, Comparative--Periodicals.