[Ger-Poland-Volhynia] Information request

[Lorne Bohn]

Can anyone tell me how I can find birth records for 

Nikolaus Rudolf Bohn  (could be spelled Nikolaus, Nicolaus, Klaus)
Born 22/12/1898 in Dombrowa, Worokomle, Kreis Kowel

He was the oldest of six children.  His father was Rudolf Bohn geb. 24.09.1865 in Chmielewo (Poproz-Dusa)  Beruf: Muller  Verstorben: am 15.12.1933 Narthen.  The mother of Nikolaus Bohn was Emilie Wildemann  geb. 14.03.1877 in Ruskolewki (Poproz-Dusa) verst. 24.08.1954 in Essen (Oldenburg)

Nikolaus Rudolf Bohn 
Albert Bohn born: 14.12.1908 in Worokomle
Rudolf Bohn born: 08.10.1910 in Worokomle
Wilhelm Bohn born: 13.05.1916 in Modlin (Auf der Flucht in Polen) 
Hermann Bohn born: 15.02.1919 in Wallen (Kries Allenstein Ostpreussen) 
Natalie Bohn born: 21.08.1922 in Dietrichsdorf (Ostpreusssen)

Any help would be much appreciated.

Best regards,
Lorne Bohn