The SciencesMarch 16, 1912
The Purity of Natural Waters—III
The Influence of Aquatic Organisms, of Domestic Sewage and of Industrial Waste
Stories by Maximilian Marsson
The SciencesMarch 9, 1912
The Purity of Natural Waters—II
The Influence of Aquatic Organisms, of Domestic Sewage, and Industrial Waste
The SciencesMarch 2, 1912
The Purity of Natural Waters—I
The Influence of Aquatic Organisms, of Domestic Sewage and of Industrial Waste