TY  - BOOK
AU  - Open University
TI  - History of mathematics counting numerals and calculus
U1  - Bv, L6.4      L6.5         L4.3          L4.4           L4.1         L4.2 
PY  - 1976///
CY  - Milton
PB  - Keynes Open University       
KW  - Mathematics history
ER  -