هیلر ایکس‌اچ-۴۴ (Persian Wikipedia)

Analysis of information sources in references of the Wikipedia article "هیلر ایکس‌اچ-۴۴" in Persian language version.

refsWebsite

Global rank Persian rank

low place

low place

1aviation-history.com

low place

low place

1books.google.com

3^rd place

6^th place

aviastar.org

"Hiller XH-44 helicopter - development history, photos, technical data". www.aviastar.org. Retrieved 2020-06-28.

aviation-history.com

"Hiller XH-44 Hiller Copter". www.aviation-history.com. Retrieved 2020-06-28.

books.google.com

McGowen, Stanley S. (2005). Helicopters: An Illustrated History of Their Impact (به انگلیسی). ABC-CLIO. ISBN 978-1-85109-468-4.