TY  - BOOK
AU  - Freudenthal,Hans
TI  - Mathematics observed
T2  - World university library
AV  - QA93 .F6813 1967b
U1  - 510 
PY  - 1967///]
CY  - New York
PB  - McGraw-Hill
KW  - Mathematics
KW  - Popular works
KW  - Local
ER  -