Mexican art historians weigh in on upcoming Kahlo's auction that could fetch up to $60 million

Frida Kahlo's "El sueno (La cama)" - in English, "The Dream (The Bed)" - is causing a stir among art historians as its estimated $40 million to $60 million price tag would make it the most expensive work by any female or Latin American artist when it goes to auction later this month.
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