The SciencesMarch 22, 1919
The North Sea Mine Barrage--II
Methods of Operation of the U. S. Minelaying Squadron
Stories by Reginald R. Belknap
The SciencesMarch 15, 1919
The North Sea Mine Barrage—I
Closing the North Sea With a Wall of Mines, 230 Miles Long by 25. Wide--The Preparatory Work