Columbia subject headings:
Developmental biology--Philosophy.
Embryology--Philosophy.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Harvard subject headings:
Developmental biology--Philosophy.
Embryology--Philosophy.
Hegel, Georg Wilhelm Friedrich, 1770-1831
Princeton subject headings:
Developmental biology--Philosophy.
Embryology--Philosophy.
Hegel, Georg Wilhelm Friedrich, 1770-1831.