Great scientific achievements. 

 - Pasadena, Calif.  Salem Press  c1994. 
 - 10 v.  ill.  30 cm. 
 - The Twentieth century .
 - Twentieth century (Pasadena, Calif.) .
<br/><br/> "A Magill book from the editors of Salem Press."  Includes indexes. 
<br/><br/>1. 1880-1905 -- 2. 1906-1916 -- 3. 1917-1929 -- 4. 1929-1938 -- 5. 1938-1949 -- 6. 1950-1958 -- 7. 1958-1964 -- 8. 1964-1973 -- 9. 1973-1982 -- 10. 1982-1994. 
<br/><br/><label>ISBN: </label>0893568600 (set : alk. paper) 
<br/><br/><label>LCCN: </label>94001829  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--History--Encyclopedias.--20th century<br/>Technology--History--Encyclopedias.--20th century
<br/><br/><label>LC Class. No.: </label>Q121  / .G72 1994 
<br/><br/><label>Dewey Class. No.: </label>509/.04