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In page Folk Songs (Berio):

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Berberian discovered the last song, known in the suite as "Azerbaijan Love Song", on a 78 RPM record from the Azerbaijan Soviet Socialist Republic, sung in the Azerbaijani language except for one verse in Russian, which a Russian-speaking friend told her compared love to a stove. Berberian sang, purely by rote, the sounds she transcribed as best she could from that scratchy old record. She knew not one word of Azerbaijani.