Columbia subject headings:
Fibonacci, Leonardo, approximately 1170-approximately 1240.
Mathematics--Early works to 1800.
Number theory--Early works to 1800.
Harvard subject headings:
Fibonacci, Leonardo, approximately 1170-approximately 1240.
Mathematics, Medieval--Sources.
Mathematics--Early works to 1800
Number theory--Early works to 1800.
Princeton subject headings:
Fibonacci, Leonardo, approximately 1170-approximately 1240.
Mathematics--Early works to 1800.
Number theory--Early works to 1800.