Columbia subject headings:
Harvard subject headings:
Clutius, Theodorus, 1546-1598. Opuscula duo singularia.
Cluyt, Dirck Outgertz. Opuscula duo singularia.
Mayflies--Early works to 1800.
Princeton subject headings:
Cluyt, Outgert, 1577-1636.
Entomology--History.
Insects--Netherlands.
Mayflies.