Bova, Ben <br/><br/>
The craft of writing science fiction that sells / 
Ben Bova. 
 - Cincinnati :  Writer's Digest Books,  c1994. 
 - 218 p. 
<br/><br/> Includes bibliography and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science fiction--Authorship.