2. Coll 30/124A 'Koweit (Neutral Zone) Oil Concession: Negotiations with Petroleum Concessions Ltd.' Date: 1945/1949 Language: English
3. Coll 30/124 'Koweit (Neutral Zone) Oil Concession: Negotiations with Petroleum Concessions, Ltd.' Date: 1935/1947 Language: English Geographic region: Kuwait-Saudi Arabia Neutral Zone