Collier's encyclopedia : [In 24 vol.] : With Bibliogr. a. ind. / Ed. director William D. Halsey ; Ed. in chief Louis Shores. - [S. L.] : Crowell-Collier educational corp., 1969. - 28 cm.см.[MFN: 11910]
• Shores, Louis (ed.);
Vol. 9 : [Electron Gun to Fischer]. - 1969. - [6], 761 p. : ill.[MFN: 11919]
UDC: 030=111
E 22.749/4 = 031=2/C-70 - Reference and Bibliographic Division