| Convention concerning the Organisation of Combat against Locusts |
Extension
|
15 October 1923 |
|
| Protocol regarding the International Convention of June 7, 1905, for the Creation of the International Institute of Agriculture |
Extension
|
21 April 1926 |
|
| Convention Wireless Telegraphy (European Broadcasting frequencies) |
Signature
|
19 June 1933 |
|
| Convention concerning International Telecommunications |
Extension
|
26 December 1933 |
|
| Universal Postal Convention |
Extension
|
6 April 1935 |
|
| International Agreement modifying the International Convention of June 21, 1920 for the establishment of an International Institute of Refrigeration |
Extension
|
31 May 1937 |
|
| Convention on the Protection and Promotion of the Diversity of Cultural Expressions |
|
|
|