English: The city of Niamey, Niger, in December 1930. The large house in the centre is the French governor's residence. Air photo taken by Swiss pilot and photographer Walter Mittelholzer (1894-1937).
Français : La ville de Niamey, au Niger, en décembre 1930. La grande maison au centre de l'image est la résidence du gouverneur général français. Photographie aérienne prise par le pilote et photographe suisse Walter Mittelholzer (1894-1937).
日期
(creation), 1932 (publication)
來源
English: Own scan from book Tschadseeflug by Walter Mittelholzer, published in 1932 in Switzerland published by "Verlag Schweizer Aero-Revue" in Zürich.
Français : Scanné du livre Tschadseeflug de Walter Mittelholzer, publié en 1932 en Suisse par "Verlag Schweizer Aero-Revue" à Zürich.
Mittelholzer, Walter (1932年) 《 Tschadseeflug: Mit dem drei-motorigen Fokker der Swissair durch die Sahara zum Tschadsee》、苏黎世: Verlag Schweizer Aero-Revue OCLC: 36954405.
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
Public domainPublic domainfalsefalse
This work is in the public domain in the United States because it meets three requirements:
it was first published outside the United States (and not published in the U.S. within 30 days),
it was first published before 1 March 1989 without copyright notice or before 1964 without copyright renewal or before the source country established copyright relations with the United States,
it was in the public domain in its home country (瑞士) on the URAA date (1 January 1996).
有關於背景資訊,請參考非美國著作權的解釋。 The Swiss copyright on Mittelholzer's work's expired at the end of 1987, since Switzerland had a copyright term of 50 years p.m.a. until 1993, and the extension to 70 years p.m.a. made in 1993 did not restore already expired copyrights.
{{Information |Description=The city of Niamey, Niger, in December 1930. Air photo taken by Swiss pilot and photographer Walter Mittelholzer (1894-1937). |Source=Book "Tschadseeflug" (1932) by Walter Mittelholzer |Date= |Author=Walter Mittelholzer (1894-19