Great scientific achievements.
- Pasadena, Calif. : Salem Press, c1997.
- 13 v. : ill. ; 30 cm.
- The Twentieth century .
- Twentieth century (Pasadena, Calif.) .
"A Magill book from the editors of Salem Press." Includes indexes.
0893568600 (set : alk. paper)
94001829
Science--History--Encyclopedias.--20th century
Technology--History--Encyclopedias.--20th century
Q121 / .G72 1994
509/.04
"A Magill book from the editors of Salem Press." Includes indexes.
0893568600 (set : alk. paper)
94001829
Science--History--Encyclopedias.--20th century
Technology--History--Encyclopedias.--20th century
Q121 / .G72 1994
509/.04