TY  - BOOK
AU  - Held,Wolfgang
AU  - Barton,Matthew
TI  - The quality of numbers 1 to 31
SN  - 9780863158643 (pbk.)
AV  - QA 141 .H474 2012
U1  - M 513 23
PY  - 2012///
CY  - Edinburgh
PB  - Floris Books
KW  - Number concept
KW  - Mathematics
N1  - Includes bibliographical references (p. 141); College; 1210L-1700L
ER  -