Roehl, Harvey N., <br/><br/>
Player pianos and music boxes :  keys to a musical past, being an illustrated treatise on the various types of mechanical musical instruments which have enlightened the spirits of mankind over many decades, with particular attention paid to pictures and advertising materials from the early days, and special emphasis on the remarkable musical characteristics of these devices / 
 Keys to a musical past 
by Harvey N. Roehl. 
 - 48 pages :  illustrations ;  28 cm 
<br/><br/><label>ISBN: </label>0911572066 9780911572063 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mechanical musical instruments.<br/>Player piano.<br/>Mechanical musical instruments.<br/>Player piano.
<br/><br/><label>Subjects--Index Terms: </label>Collecting USA Basic Mechanical music