[river] The Gravina (also called Gravina di Picciano) is an Italian river that flows into the Bradano. Its source is near Poggiorsini in the province of Bari. It flows southeast and crosses into the province of Matera before emptying into the Bradano a short distance after the Bradano exits Lago di San Giuliano. ...
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http://en.wikipedia.org/wiki/Gravina_(river)

The Gravina was a Spanish Churruca Class destroyer of 1536 tons displacement launched in 1931. The Gravina was powered by four 3-drum type oil-fired boilers providing a top speed of 36 knots and a range of 7200 km at 14 knots. She carried a complement of 175 and was armed with five 4.7 inch guns; one 3 inch anti-aircraft gun; four machine-guns; two...
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http://www.probertencyclopaedia.com/browse/RG.HTM
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