TY  - BOOK
AU  - Warner,Gertrude Chandler
AU  - Cunningham,David
TI  - Tree house mystery 
T2  - The Boxcar Children Mysteries
SN  - 0590426745 (pbk.) :
AV  - PZ7.W244 Tr 1990
U1  - [Fic] 20
PY  - 1990///, c1969
CY  - Chicago
PB  - A. Whitman
KW  - Mystery and detective stories
N1  - Reprint. Originally published: 1969; 470; Lexile
N2  - Six children help solve the mystery of a missing spyglass that has kept two brothers feuding for years
ER  -