Why in the ponds of crucian carp were translated

Grimm, O.A.Why did the karasi translate in the ponds / Dr. O.A.Grimm.- St. Petersburg: ed.Imp.Ros.Fisheries and Fisheries, 1902. -18, [1] p.: silt .. -Ex.: With a handle.litter..1. Territory (collection).Electronic copy source: PBOriginal storage location: Ban RAS