1
|
|
Research aircraft. / https://id.loc.gov/authorities/subjects/sh87004290
|
2002
|
1
|
2
|
|
research aircraft germany history : Griehl, Manfred.
|
2012
|
1
|
3
|
|
Research aircraft -- History. / https://id.loc.gov/authorities/subjects/sh87004290 https://id.loc.gov/authorities/subjects/sh99005024
|
2002
|
1
|
5
|
|
Research aircraft -- United States -- History -- 20th century. / https://id.loc.gov/authorities/subjects/sh87004290 https://id.loc.gov/authorities/names/n78095330-781 https://id.loc.gov/authorities/subjects/sh2002006165 : Petty, Chris,
|
2020
|
1
|