sentences:  At the Tenth Party Congress, Vladimir Ulyanov said that the fuel crisis had led to the need to spend gold on the purchase of coal from abroad.Ulyanov, realizing that the economic crisis in Russia was too deep and that industry in the young Soviet Republic could not be restored on its own, wrote the "Letter to American Workers".In this letter, he called on workers of the Communist Parties of developed countries to help organize a new industrial base for the new workers' state.