^The Role of Contributions of Hydraulic Testing Labs: Part I, Industrial Revolution to World War I. George Hecker, Albert Feron, Bruce J. Pennino. Civil Engineering Practice: Spring/Summer 1999
^The Role of Contributions of Hydraulic Testing Labs: Part V, Current and Future Trends. George Hecker, Albert Feron, Bruce J. Pennino. Civil Engineering Practice: Spring/Summer 2001