TY  - BOOK
AU  - Ziemer,Mary
TI  - Grammar contexts: a resource guide for interactive practice 
SN  - 0472085395
PY  - 1999///
CY  - Michigan, Colo.
PB  - The University of Michigan Press
KW  - Grammar, Comparative and general
KW  - Computational linguistics
N1  - Includes bibliographical references; Contents : The present tense--The past tense--The future tense--The present perfect ... [et al.]
ER  -