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Deibert, E. J. 1996. Earthworms and Soil Health. Page 4 in Manitoba-North 
     Dakota Zero Tillage Farmer’s Association Newsletter.  Spring-1996.

Deibert, E. J. and R. A. Utter. 1994. Earthworm Populations Related to Soil and 
     Fertilizer Management Practices. Better Crops 78(3):9-11.

Deibert, E. J. and R. A. Utter. 2003. Earthworm (Lumbricidae) survey of North 
     Dakota fields placed in the United States Conservation Reserve Program.  
     JSWC 58(1):39-45.

Deibert, E. J. and R. A. Utter. 2003. Earthworm (Aporrectodea tuberculata) 
     removal of surface crop residues. 19p. Department of Soil Science Research 
     Report No. 46. Agricultural Experiment Station. North Dakota State 
     University. Fargo, ND 58105.

Deibert, E. J., R. A. Utter and J. Enz. 2003. Winter survival of Aporrectodea 
     tuberculata earthworms in the Northern Great Plains under different soil 
     surface cover. 13p. Department of Soil Science Research Report No. 45. 
     Agricultural Experiment Station. North Dakota State University. Fargo, ND 
     58105.

Deibert, E. J., R. A. Utter, and D. P. Schwert. 1991. Tillage System Influence 
     on Earthworms (Lumbricidae) in North Dakota. North Dakota Farm Research 
     48(5):10-12.

Utter, R. A. and E. J. Deibert. 1998. Earthworm population estimates in North 
     Dakota (Lumbricidae). North Dakota Academy of Science Proceedings vol 
     52:35. 

Utter, R. A., E. J. Deibert and D. P. Schwert. 1992. Earthworms (Lumbricidae) 
     of Eastern North Dakota. North Dakota Academy of Science Proceedings. 
     46:61.

Utter, R. A., E. J. Deibert, and D. P. Schwert. 1995. Earthworms of North 
     Dakota.  Jamestown, ND: Northern Prairie Wildlife Research Center Online.  
     http://www.npwrc.usgs.gov/resource/inverts/wormsnd/wormsnd.htm
     (Version 02JAN98).

Utter, R. A., E. J. Deibert, and D. P. Schwert. 1995. Survey of North Dakota 
     Earthworms. North Dakota Academy of Science Proceedings. 49:48.