The grammar cracker  unlocking English grammar /  [electronic resource] : 
[produced by] Vocalis Ltd. 
 - [Cambridge, England] :  Vocalis, Ltd.,  c2001. 
 - 136 p. 
<br/><br/> Presents the rules of English grammar, including word origins, parts of speech, sentence structure, punctuation, and writing styles. 
<br/><br/><br/>Electronic reproduction. Ann Arbor, MI : ProQuest, 2016. Available via World Wide Web. Access may be limited to ProQuest affiliated libraries. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer games.<br/>English language--Grammar--Software.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Electronic books.
<br/><br/><label>LC Class. No.: </label>PE1128.3  / .G73 2001 
<br/><br/><label>Dewey Class. No.: </label>428.3/4