Try

=AVERAGE(
INDIRECT("'[#1 Turb-Jun09.xls]"&ROW(A7)&"'!$E$164"),
INDIRECT("'[#1 Turb-Jun09.xls]"&ROW(A7)&"!$D$164"),
INDIRECT("'[#1 Turb-Jun09.xls]"&ROW(A7)&"'!$C$164"))

HTH

Bob


"tiazmos" wrote in message
...
I have the following formula:

=AVERAGE('[#1 Turb-Jun09.xls]7'!$E$164,'[#1 Turb-Jun09.xls]7'!$D$164,'[#1
Turb-Jun09.xls]7'!$C$164)

It references a monthly workbook (#1 Turb-Jun09.xls) with a sheet for
every
day in the same workbook. In this case, I am averaging three cells on the
sheet labeled 7. The data points and cells are identical (although not in
value) in every sheet. All I wish to do is copy this formula to replace
the
three 7's with an 8, then 9, then 10 and so on without manually doing
that.

I have tried filling out 7 of them to see if autocomplete could recognize
the pattern when they are highlighted, but it doesn't.

Thank you for your help.