How does this work? It's a macro, so add this to a Module in your document.
Sub add_hundreds_of_refs() Dim myDoc As Document Set myDoc = ActiveDocument Dim i As Long With myDoc .MailMerge.Fields.Add Range:=Selection.Range, Name:="Code" .MailMerge.Fields.Add Range:=Selection.Range, Name:="Type" .MailMerge.Fields.Add Range:=Selection.Range, Name:="Amount" Selection.TypeParagraph For i = 1 To 200 .MailMerge.Fields.Add Range:=Selection.Range, Name:="Code" & i .MailMerge.Fields.Add Range:=Selection.Range, Name:="Type" & i .MailMerge.Fields.Add Range:=Selection.Range, Name:="Amount" & i Selection.TypeParagraph Next i End With End Sub