Bova, Ben <br/><br/>
Twice seven :  Stories / 
 Twice 7 
B. Bova. 
 - New York :  Avon Eos,  1998. 
 - 290 p. ;  18 cm. 
 - Science - fiction .
<br/><br/><label>ISBN: </label>0380797410 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Short stories, American
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Science fiction