John F. Hayford

Discussion of Some Devices for Increasing the Accuracy or Rapidity of Surveying Operations by Walter Loring Webb

L. C. Sabin, Horace Andrews, Gerard H. Matthes, 1902 .

What is the Center of an Area, or the Center of a Population?

John F. Hayford, J. F. Hayford, 1902, Publications of the American Statistical Association.