Catalogue Persistent Identifier
https://nla.gov.au/nla.cat-vn4029131
APA Citation
Marsh, J. G. & Goddard Space Flight Center. (1987). An improved model of the earth's gravitational field GEM-T1. [Greenbelt, Md.?] : [Springfield, Va : National Aeronautics and Space Administration, Goddard Space Flight Center ; For sale by the National Technical Information Service]
MLA Citation
Marsh, J. G. and Goddard Space Flight Center. An improved model of the earth's gravitational field [microform] : GEM-T1 / J.G. Marsh ... [et al.] National Aeronautics and Space Administration, Goddard Space Flight Center ; For sale by the National Technical Information Service] [Greenbelt, Md.?] : [Springfield, Va 1987
Australian/Harvard Citation
Marsh, J. G. & Goddard Space Flight Center. 1987, An improved model of the earth's gravitational field [microform] : GEM-T1 / J.G. Marsh ... [et al.] National Aeronautics and Space Administration, Goddard Space Flight Center ; For sale by the National Technical Information Service] [Greenbelt, Md.?] : [Springfield, Va
Wikipedia Citation
{{Citation | title=An improved model of the earth's gravitational field [microform] : GEM-T1 / J.G. Marsh ... [et al.] | author1=Marsh, J. G | author2=Goddard Space Flight Center | year=1987 | publisher=National Aeronautics and Space Administration, Goddard Space Flight Center ; For sale by the National Technical Information Service] | language=English }}