Bone, Q. <br/><br/>
The origin of chordates / 
Q. Bone. 
 - 2nd ed., rev. 
 - Burlington, N.C. :  Scientific Publications Division, Carolina Biological Supply Co.,  1979. 
 - 16 p. :  ill. 
 - Carolina biology readers ;  18 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chordata, Fossil.<br/>Chordata--Evolution.