Budowa dróg, klasyfikacja i drenaż autostrad.

Kp. The location grading and drainage of highways / by Wilson G. Harger. - New York ; London, 1921. K. tyt.: (Wilson G. Harger, C. E. ; Engineer New York State Department of Highways; Former Senior Highway Engineer, United States Office of Roads. Author of "Highway Engineers Handbook", etc.)

LCC online (Harger, Wilson Gadner, 1882- ).

books.google.pl, 04.06.19 (Harger, Wilson Gardner, 1882-) https://books.google.pl/books?id=O6EhAQAAIAAJ&pg=PA132&dq=Harger,+Wilson+Gardner%E2%80%8F&hl=pl&sa=X&ved=0ahUKEwiH85iKwc_iAhWI_CoKHQRFDwgQ6AEITTAF#v=onepage&q=Harger%2C%20Wilson%20Gardner%E2%80%8F&f=false

Hatchi Trust, Digital Library, 04.06.19 (Harger, Wilson Gardner, 1882- ) https://catalog.hathitrust.org/Record/011205466