Optical comparator (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Optical comparator" in English language version.

refsWebsite

Global rank English rank

1freepatentsonline.com

5,449^th place

3,875^th place

1hathitrust.org

441^st place

311^th place

70^th place

63^rd place

5^th place

5^th place

1qualitydigest.com

low place

low place

1sipconinstrument.com

low place

low place

freepatentsonline.com (Global: 5,449^th place; English: 3,875^th place)

Hartness, James; Porter, Russell (1929). "United States Patent 1703933: Optical comparator". U.S. Patent Office.

hathitrust.org (Global: 441^st place; English: 311^th place)

babel.hathitrust.org

Roe 1937, pp. 43–45. Roe, Joseph Wickham (1937), James Hartness: A Representative of the Machine Age at Its Best, New York: American Society of Mechanical Engineers, LCCN 37016470, OCLC 3456642. link from HathiTrust.

loc.gov (Global: 70^th place; English: 63^rd place)

lccn.loc.gov

Roe 1937, pp. 43–45. Roe, Joseph Wickham (1937), James Hartness: A Representative of the Machine Age at Its Best, New York: American Society of Mechanical Engineers, LCCN 37016470, OCLC 3456642. link from HathiTrust.

qualitydigest.com (Global: low place; English: low place)

Smith, Kennedy (2002). "Shedding light on optical comparators—How much better can this type of system get?". Quality Digest: QCI International. Retrieved 2008-05-12.

sipconinstrument.com (Global: low place; English: low place)

Sipcon, Instrument. "What Is Profile Projector". Vision Measuring Machine and Profile Projector. Retrieved 8 December 2016.

worldcat.org (Global: 5^th place; English: 5^th place)

search.worldcat.org

Roe 1937, pp. 43–45. Roe, Joseph Wickham (1937), James Hartness: A Representative of the Machine Age at Its Best, New York: American Society of Mechanical Engineers, LCCN 37016470, OCLC 3456642. link from HathiTrust.