List of references on grade crossings. 

 - [Washington,  1915] 
 - 27 numb. l.  33 x 21 cm. 
<br/><br/><label>LCCN: </label>ca 15001304  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Railroad crossings--Bibliography.
<br/><br/><label>LC Class. No.: </label>Z7234.C82  / B8