00259nam a2200109 a 450000500170000002000150001708200150003210000220004724500180006926000390008730000230012620251203110810.0  a0486682528  a512.7bAND  aAndrews, George E  aNumber Theory  aNew YorkbDover Publicationsc1994  ax,259p.c24 cm. PB