Columbia subject headings:
Comenius, Johann Amos, 1592-1670.
Dury, John, 1596-1680.
Hartlib, Samuel, -1662.
Harvard subject headings:
Comenius, Johann Amos, 1592-1670
Dury, John, 1596-1680.
Hartlib, Samuel, -1662
Princeton subject headings:
Comenius, Johann Amos, 1592-1670.
Dury, John, 1596-1680.
Hartlib, Samuel, -1662.