TY  - BOOK
TI  - Knock ! knock : : a book of laughs
T2  - Waves : language across the curriculum
SN  - 0395559774
U1  - 428.6 23
PY  - 1992///
CY  - Toronto, Canada : 
PB  - Houghton Mifflin Company , 
KW  - Readers
ER  -