'''Calca''' may refer to: *Calca Peninsula, a peninsula in South Australia * Calca Province, one of thirteen provinces in the Cusco Region of Peru * Calca District, one of the eight districts in the Calca Province * Calca, Peru, capital of the Calca District and Province * Calca, South Australia, a settlement on the west coast of Eyre Peninsula * CALCA, the abbreviation for calcitonin-related polypeptide alpha
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