The Jurassic ammonite zones of the Soviet Union 
edited by G. Ya. Krymholts, M. S. Mesezhnikov, G. E. G. Westermann 
 - Boulder, Colorado  The Geological Society of America  1988 
 - 116 p. : ill. ; 28 cm. 
 - Special paper  223 .
<br/><br/><label>ISBN: </label>0813722233 
<br/><br/><label>LCCN: </label>88-022954 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Jurassic<br/>Geology--Soviet Union