Sparro R. P.,  Dubakh A. D. Osushenie bolot otkrytymi kanavami./Sparro R. P.,  Dubah A. D. Drainage of marshes by open ditches. In Russian - landofmagazines.com

TransliterationSparro R. P., Dubakh A. D. Osushenie bolot otkrytymi kanavami.

In EnglishSparro R. P., Dubah A. D. Drainage of marshes by open ditches. In Russian

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