Sarton, George 1884-1956.
Introduction to the history of science /
George Sarton 
. - Baltimore : Williams & Wilkins Company,  1947- 
. - v.  26 cm. 
 - (Carnegie Institution of Washington publication  ; 376 )
<br/> V. 3. Science and learning in the fourteenth century. Pt. 1. First half of the fouteenth century  <br/>  V. 3. Science and learning in the fourteenth century. Pt. 2. Second half of the fouteenth century  <br/>   <br/>