Edward S. Ritchie & Sons. <br/><br/>
Ritchie's illustrated catalogue of philosophical instruments and school apparatus. 

 - Boston :  [Ritchie,  1866?] 
 - 6, 57 p. ;  ill. ;  24 cm. 
<br/><br/><label>LCCN: </label>ca 05002389  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical instruments--Catalogs.
<br/><br/><label>LC Class. No.: </label>AC901  / .D7 box 60, no. 15