Find Top 2 In Each Group

I'm trying to create a query that lists the last TWO entries (meter_read_date) and grouped by each distinct meter (meter_sn). ** In other words, I have a table with three fields (meter_sn, meter_read_date, meter_read_count), each month people input there meter readings. I want to create a query that will list each distinct meter_sn with the last two date entries.**

This is what I have, but it lists too many from each meter...
SELECT UTIL_METER_READ.METER_SN, Max(UTIL_METER_READ.METER_READ_DATE) AS MaxOfMETER_READ_DATE, UTIL_METER_READ.METER_READ_COUNT
FROM UTIL_METER_READ
GROUP BY UTIL_METER_READ.METER_SN, UTIL_METER_READ.METER_READ_COUNT
HAVING (((Max(UTIL_METER_READ.METER_READ_DATE)) In (select top 15 meter_read_date from util_meter_read ORDER BY METER_READ_DATE DESC)))
ORDER BY UTIL_METER_READ.METER_SN DESC , Max(UTIL_METER_READ.METER_READ_DATE) DESC;