022114P.pdf   02/11/2003  Roger J. Bergfeld  v.  Martin Marietta Corp
   U.S. Court of Appeals Case No:  02-2114
   Northern District of Iowa   
   Civil case - Torts. District court did not err in granting defendant 
   summary judgment on plaintiffs' product liability claim 
   concerning injuries from inhaling silica sand, as the record 
   established that plaintiffs' employer was a sophisticated used 
   of the sand and defendant therefore had no duty to warn the 
   employer of the risks posed by excessive exposure to silica 
   sand; while defendant failed to provide the name of the 
   employer's Manager of Industrial Hygiene, the district court 
   did not err in relying on the manager's affidavit, as plaintiffs 
   were aware that the manager had prepared several surveys 
   of environmental health problems at the plant and plaintiffs 
   had adequate notice that he was a person who had 
   discoverable information.