Operacja Chopper (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Operacja Chopper" in Polish language version.

refsWebsite

Global rank Polish rank

2books.google.com

3^rd place

27^th place

1whitehouse.gov

1,241^st place

1,771^st place

38^th place

231^st place

756^th place

32^nd place

archive.ph

David Hawley: On This Day: America begins first combat operation in Vietnam War. Warrior, 2015-01-12. [dostęp 2015-08-30]. (ang.).

books.google.com

Lonnie M. Long, Gary B. Blackburn: Unlikely Warriors. iUniverse, 2013, s. 54–55. ISBN 1-4759-9057-X.
James E. Westheider: The Vietnam War. Greenwood Publishing Group, 2007, s. 10. ISBN 0-313-33755-1.

whitehouse.gov

Presidential Proclamation – Vietnam Veterans Day. The White House, 2012-03-29. [dostęp 2015-08-30]. (ang.).

yahoo.com

news.yahoo.com

Julian Gavaghan: On This Day: America begins first combat operation in Vietnam War. Yahoo News, 2014-01-10. [dostęp 2015-08-30]. (ang.).