TY  - BOOK
AU  - Dardig, Jill C.
AU  - Heward, William L.,
TI  - Sign here: A contracting book for children and their parents 
SN  - 0914474197
AV  - HQ769 D36
PY  - 1976///
CY  - Kalamazoo, mich.
PB  - Behaviordelia
KW  - Vida familiar
KW  - Padres e hijos
KW  - Conducta (Psicología)
ER  -