best way to access property values in shell

hi,
Is it possible to access property values in below way in shell script ? :)

would like to dynamically get property value based on a property which has variable as part of it.

# prop.properties
COUNTRY_LIST=USA,AUS
USA_STATES=NY,NJ
AUS_STATES=NSW,TAS

# getStatus.sh
source prop.properties
for COUNTRY in $(echo ${COUNTRY_LIST} | sed "s/,/ /g")
do
      echo "COUNTRY : $COUNTRY"

      # Would like to get "NY,NJ" and "NSW,TAS" respectively
        # Would like to get USA_STATES AND AUS_STATES
      echo "COUNTRY_STATES : ${COUNTRY}_STATES"
done

Thanks in advance