TY  - BOOK
AU  - Durr,William K.
TI  - Keystone
T2  - Houghton Mifflin reading series
SN  - 0395294135
U1  - 808.8 
PY  - 1976///
CY  - Boston
PB  - Houghton Mifflin
KW  - Readers
N1  - Includes glossary; Includes bibliographies; Primary
ER  -