Paul R. Erwin
wrote The Winston Grammar Program: Basic Level Student's Workbook
comprising pages back in 1992.
Textbook and eTextbook are published under ISBN 0838851134 and 9780838851135.
Since then The Winston Grammar Program: Basic Level Student's Workbook textbook
was available to sell back to BooksRun online for the top buyback price
or rent at the marketplace.
In The Winston Grammar Program learning is incremental, with each lesson building upon previously-learned material. All lessons after the first, therefore, contain some built-in review. Most lessons introduce a new concept stated as a focus in the following (30 worksheet in the contents) list; however, some lessons are entirely review work. For a free catalog, phone (800) 348-1750 or Hewitt Educational Resources, PO Box 9, Washougal, WA 98671. (from book)