Allen, Frank C. <br/><br/>
Railroad curves and earthwork / 
by C.Frank Allen 
 - 7th ed. 
 - London :  McGraw-Hill,  1931. 
 - xiii, 290 p. :  ill. 
<br/><br/><label>LCCN: </label>44041066  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earthwork.<br/>Railroad engineering.