00490nam a2200181Ia 4500003000900000008004100009020001800050040001600068080001500084100001900099245005900118260003900177300001500216650002200231650001700253650002100270650001700291IN-BaIIA211028s9999    xx            000 0 eng d  a0-486-65940-2  cIIA Library  a512.5bLAN  aLandin, Joseph 3aAn Introduction to algebraic structurescJoseph Landin  aNew YorkbDover Publicationsc1969  avii, 247p.  aElementary theory  aHomomorphism  aPolynomial rings  aReal numbers