NDGS newsletter : a publication of the North Dakota Geological Survey.
North Dakota Geological Survey.
Grand Forks, N.D. : North Dakota Geological Survey,
[1974]-
Title from PDF of cover (viewed Sept. 17, 2003).
Issues for  called also: 
Mode of access: World Wide Web.
Latest issue consulted: Vol. 30, no. 2 (winter 2003-2004), viewed May 17, 2004.
Geology
Geology.