• 3 Jen do studovny

• 3 Kniha

Externí sklad

• 2 Blackwell, O. B.
• 1 American Telephone and Telegraph Company
• 1 Blackwell. O. B.
• 1 Colpitts, Edwin Henry, 1872-1949
• 1 Midwinter Convention of the A.I.E.E

• 3 angličtina

• 3 RETROKON-MAP15