Jelasin soal Grumman FF dong

Grumman FF (sebutan perusahaan G-5) adalah pesawat tempur biplan Amerika dioperasikan oleh Angkatan Laut Amerika Serikat pada 1930-an.

Itu adalah pesawat tempur kapal induk pertama dengan landing gear ditarik.

Fitzsimons, Bernard, ed. The Illustrated Encyclopedia of the 20th Century Weapons and Warfare. New York: Purnell & Sons Ltd., 1967/1969, ISBN 0-8393-6175-0.

Green, William, ed. "The Strange Story of Grumman's First Fighter".Flying Review International, Volume 22, No. 2, October 1966.

Green, William and Gordon Swanborough. The Complete Book of Fighters. New York: Barnes & Noble Inc., 1988, ISBN 0-7607-0904-1.

Levy, Howard. "All the Way Home." Air Progress, Volume 19, No. 4, October 1966.

Levy, Howard. "Canadian-built Goblin Restored." Canadian Aviation, Volume 39, No. 12, December 1966.

Listemann, Phil H. Allied Wings No.6: Grumman FF. London: Philedition, 2008. ISBN 978-2-9532544-0-2.

Swanborough, Gordon and Peter M. Bowers. United States Navy Aircraft Since 1911. Annapolis, Maryland: Naval Institute Press, 1976. ISBN 0-87021-968-5.

Winchester, Jim. Fighters of the 20th Century. Shrewsbury, UK: Airlife Publishing Ltd., 2002. ISBN 1-84037-388-1.