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Books about Opdam:
The Modified Barrowman Method With Applications to the OPDAMS (Optical Deep Attack Missile Systems) and PDAMS... by Charles E. Hall Jr (1989)
Het Leven en de Daden der Beromde Vaderlandsche Zeehelden Marten Herbertsz. Tromp, Luitenant Admiraal van Holland... by J.A. OOSTKAMP (1825)
Battle of the Sound or Baltic; Fought October 30th (O.S.), [November 9th N.S.] 1658, Between the Victorious Hollanders... by J. Watts de Peyster (1858)
Wiki information Opdam:
Barry Opdam is a former Dutch professional footballer who played for AZ, Red Bull Salzburg and FC Volendam as a central defender.
Nicolaas Opdam is a winemaker at Laurita Winery.