Hermann Welcker (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Hermann Welcker" in English language version.

refsWebsite

Global rank English rank

6,037^th place

3,633^rd place

1patents.google.com

1,182^nd place

725^th place

ncjrs.gov

Wilder, H. H. and Wentworth, B. Personal Identification; The Gorham Press: Boston, 1918, pp. 339–340. Online reference to this work at: http://www.ncjrs.gov/pdffiles1/nij/225321.pdf (Page 1-6 or search Welcker)

patents.google.com

"Patent #408451 Hermann Welcker of Berlin, Germany Electric Eyeglasses". U.S. Patent Office (via Google patent site). July 30, 1889. Retrieved 2010-11-27.