2
|
|
Machinery industry. / https://id.loc.gov/authorities/subjects/sh85079384 : Pratt & Whitney Company.
|
1930
|
1
|
4
|
|
Machinery industry -- Pennsylvania -- Philadelphia -- History. / https://id.loc.gov/authorities/subjects/sh85079384 https://id.loc.gov/authorities/names/n78095520-781 https://id.loc.gov/authorities/subjects/sh99005024 : Dawson, Andrew,
|
2004
|
1
|
5
|
|
Machinery industry -- United States -- History. / https://id.loc.gov/authorities/subjects/sh2008107155 https://id.loc.gov/authorities/subjects/sh99005024 : Dawson, Andrew,
|
2004
|
1
|
6
|
|
Machinery industry -- Vocational guidance. / https://id.loc.gov/authorities/subjects/sh85079384 https://id.loc.gov/authorities/subjects/sh2002006455
|
2005
|
1
|
7
|
|
|
|
1
|