Busonera is specific to Cagliari and Cagliari, with a small stock also in Sassari and Sant'Antioco nell'iglesiente, Busonero is instead specific to Monte Argentario and Grosseto in the Grosseto area, should derive from nicknames, also of Spanish origin ,. buzonera in Catalan is the chiavica or cesspool, terms probably used to define the profession of those who dealt with the cleaning of this type of discharge.
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