This is BibTeX, Version 0.99dThe top-level auxiliary file: igs2eannalsguide.aux
The style file: igs.bst
Database file #1: igsrefs.bib
You're missing a field part---line 35 of file igsrefs.bib
 :  year = 
 :         }
I'm skipping whatever remains of this entry
You're missing a field part---line 43 of file igsrefs.bib
 :  year = 
 :         }
I'm skipping whatever remains of this entry
Warning--to sort, need author, editor, or key in BAS_aircraft
Warning--to sort, need author or key in FAA_airworthiness
Warning--to sort, need author, editor, or key in unigraphics_nx
Warning--to sort, need author, editor, or key in patran
Warning--to sort, need author, editor, or key in military_materials98
Warning--empty author and editor in patran
Warning--empty year in patran; set to ????
Warning--empty author and editor in unigraphics_nx
Warning--empty year in unigraphics_nx; set to ????
Warning--empty author and editor in BAS_aircraft
Warning--empty author and editor in military_materials98
Warning--empty author in FAA_airworthiness
Warning--there's a number but no volume in FAA_airworthiness
(There were 2 error messages)