1761
1762
Published: 1936
Superior document: Bell telephone system B-949
1763
1764
1765
1766
1767
1768
1769
Published: 1912
Superior document: University of Toronto studies : physiological series 8
1770
Published: 1928
Superior document: Bulletin / Engineering Extension Department
1771
1772
1773
Published: 1973
Superior document: University of California publications in modern philology 101
1774
1775
1776
1777
1778
1779
Published: 1966
Superior document: Enthalten in Archeografičeskij ežegodnik za 1965 god ; Akademija Nauk SSSR, Otdelenie Istorii, Archeografičeskaja Komissija ... Moskva, 1966 10 (1966), S. 177 - 273
1780