Books by L. Leland Locke
The Warren calculating engine
The Warren calculating engine
Supplementary notes on the qui
Supplementary notes on the quipus in the American museum of natural history
A Peruvian quipu
Synchronism and anachronism
Synchronism and anachronism
Mathematics of the calculating
Mathematics of the calculating machine
The history of modern calculat
The history of modern calculating machines
The ancient quipu or Peruvian
The ancient quipu or Peruvian knot record
Some mathematics of the calcul
Some mathematics of the calculating machine
The ancient quipu, a Peruvian
The ancient quipu, a Peruvian knot record
Improved tables and informatio
Improved tables and information