Range queries with multiple tables

I have 5 tables like named this:

2009.01
2009.02
2009.03
2009.04
2009.05

Each table has a columns like this:

( id integer,
 ts timestamp,
 value char(50)
);


If I would like to search from 2009.01 to 2009.04 is it possible to
build a query like that? I was thinking if there is a clever VIEW I
can create that would include all 5 tables as 1 table.

Any thoughts or ideas?

TIA