Littmann, Mark,  1939- <br/><br/>
Comet Halley  once in a lifetime 
Mark Littmann, Donald K. Yeomans 
 - Washington, D.C  American Chemical Society  1985 
 - vii, 175 p.  ill  26 cm. 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Halley's comet
<br/><br/><label>Dewey Class. No.: </label>523.6  / 4