TY  - BOOK
AU  - Earl,Boyd
TI  - Groups and fields: a programmed unit in modern mathematics 
AV  - QA157QA157 .E15.E15
U1  - 512.807 
PY  - 1963///]
CY  - New York
PB  - McGraw-Hill
KW  - Algebra
KW  - Problems, exercises, etc
KW  - Programmed instruction
N1  - Includes bibliography
ER  -