Quill Humphrey <br/><br/>
John harrison, the man who found longitude. Forwor 
Quill Humphrey 
 - London  John Baker UK          1966 
 - xiv, 255p  cm. 
<br/><br/> Bibliography: P 240-47; Appendix: P 225-39 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography
<br/><br/><label>Dewey Class. No.: </label>U18xK93, K6