https://econtent.unm.edu/digital/collection/nuceng/id/30/rec/71 https://econtent.unm.edu/digital/collection/nuceng/id/30/rec... https://en.wikipedia.org/wiki/N

https://econtent.unm.edu/digital/collection/nuceng/id/30/rec/71 https://econtent.unm.edu/digital/collection/nuceng/id/30/rec... https://en.wikipedia.org/wiki/NS_Savannah https://en.wikipedia.org/wiki/NS_Savannah NS Savannah is not stationary either.