1. How clearly written are children's text-books? Or, of bladderworts and alfalfa;Anderson,1980
2. The problem of the “inconsiderate” text;Armbruster,1984
3. The development of writing abilities;Britton,1978
4. Coherence: Next to is not connected to;Brostoff;College Composition and Communication,1981
5. The American heritage word frequency book;Carroll,1971