Twyman, F. (Frank), 1876-1959.  Twyman, F. (Frank), 1876-1959. <br/><br/>
Optical glassworking. 

 - London :  Hilger & Watts,  [1955] 
<br/><br/> "An abridged edition of the [2d ed. of the] author's Prism and lens making." 
<br/><br/>Bibliography: p. 252-254. 
<br/><br/><label>LCCN: </label>55004221 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lenses.<br/>Optics.<br/>Eyeglasses.
<br/><br/><label>LC Class. No.: </label>QC385  / .T882