Columbia subject headings:
Bible. Gospels. Greek. Codex 28.
Bible. Mark--Criticism, Textual.
Bible. Mark. Greek.
Harvard subject headings:
Bible. Gospels. Greek. Codex 28.
Bible. Mark--Criticism, Textual.
Bible. Mark. Greek.
Princeton subject headings:
Bible. Mark--Criticism, Textual.
Bible. N.T. Mark. Greek. 1941.
Bible. New Testament. Gospels. Greek. Codex 28.