Interest of the United States in maintaining equal rights for American oil companies with those of other countries with regard to petroleum mining concessions6
6. For previous correspondence regarding access to Netherlands petroleum resources, see Foreign Relations, 1928, vol. iii, pp. 375 ff.
[Received May 11.]
[Received July 1.]
 Circular Instruction to Certain American Diplomatic and Consular Officers in the Netherlands and Its Dependencies
[Received December 13.]