TY  - BOOK
AU  - Merrill, Helen Abbot
TI  - MATHEMATICAL EXCURSIONS
U1  - 510 
PY  - 1957///
CY  - N. Y.
PB  - Dover Publications
KW  - Mathematical Recreations
KW  - Mathematics. Problems, Exercises, Etc
N1  - Answers To Some Of The Problems. P. 144-145
ER  -