Columbia subject headings:
Bible. John--Commentaries.
Sabbath.
Worship--History--Early church, ca. 30-600.
Harvard subject headings:
Bible. John--Criticism, interpretation, etc.
Sabbath.
Sacraments--Biblical teaching.
Worship--History--Early church, ca. 30-600
Princeton subject headings:
Bible. John--Commentaries.
Sabbath.
Worship--History--Early church, ca. 30-600.