Herbert, Percy,  1869- <br/><br/>
Herbert air navigation course, 
by Capt. P. Herbert. 
 - Lesson 1- 
 - [Portland, Or.]  c1928- 
 - v.  illus., diagrs.  35 1/2 cm. 
<br/><br/> Autographed from type-written copy on one side of leaf only 
<br/><br/><label>LCCN: </label>ca 29000207  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aeronautics.<br/>Navigation (Aeronautics)
<br/><br/><label>LC Class. No.: </label>TL586  / .H4