Douglas DC-1 (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Douglas DC-1" in Portuguese language version.

refsWebsite

Global rank Portuguese rank

1books.google.com

3^rd place

6^th place

low place

low place

1ku.dk

5,396^th place

9,253^rd place

afhistory.org

Air Power History, Spring 2010, Vol. 57, No. 1, page 12, http://www.afhistory.org/wp-content/uploads/2010_Spring.pdf

books.google.com

"Douglas Tells Secrets of Speed", Popular Mechanics, February 1935.

ku.dk

zi.ku.dk

"Aircraft that took part in the Spanish Civil War." Aircraft of the Spanish Civil War (zi.ku). Retrieved: February 4, 2011.