Checking Multiple Column Data Across Two Worksheets And Combining Them Into One

what i want to do is 1 have a workbook with 3 worksheets. Sheet1 contains the columns:

Reference No. Line Item No. Amount Date
1 3 500 12/01
2 4 900 01/01
Sheet2:

Reference No. Line Item No. Quantity PersonInCharge
1 3 10 Kim
5 6 60 Noel

For sheet 3, what i want to happen is that when i run the VBA macro, it searches through both worksheets (Sheet1 and Sheet2), finding rows that have matching Reference No. AND Line Item No. and combine all of the columns (and values) for that particular row into another row in Sheet 3. So for the above data set, the resulting data in Sheet 3 would be:

Reference No. Line Item No. Amount Date Quanity PersonInCharge
1 3 500 12/01 10 Kim

As this is the only entry in both sheet1 and sheet2 where there is a matching reference and line item no.