TY  - BOOK
AU  - Durr,William Kirtley
AU  - Windley,Vivian O.
AU  - Yates,Mildred C.
TI  - Keystone
T2  - Houghton Mifflin reading series
SN  - 0395204135
AV  - PE1121 .K43
U1  - 428/.6 
PY  - 1976///
CY  - Boston
PB  - Houghton Mifflin
KW  - Readers
N1  - Includes bibliographies
UR  - http://www.archive.org/details/keystone00durr
UR  - http://www.openlibrary.org/books/OL5255738M
ER  -