Drake, David,  1945- <br/><br/>
Fortress/ 
David Drake. 
 - New York :  TA T. Doherty Book,  1988. 
 - 311 p. ;  18 cm. 
<br/><br/><label>ISBN: </label>0-812536207 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science fiction--American<br/>Bilim kurgu, Amerikan.
<br/><br/><label>LC Class. No.: </label>PS3554.R196 
<br/><br/><label>Dewey Class. No.: </label>813/.54