SQL & PL/SQL

dear all;

I have the following sample data shown below

create table table_one
(
 v_id varchar2(60),
 close_date date
);

insert into table_one
  (v_id, close_date)
values
  ('A', to_date('1/1/2010 4:47:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
insert into table_one
  (v_id, close_date)
values
  ('A', to_date('1/2/2010 2:47:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
insert into table_one
  (v_id, close_date)
values
  ('A', to_date('1/3/2010 1:47:19 PM', 'MM/DD/YYYY HH:MI:SS:AM'));   
insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/4/2010 5:47:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/5/2010 4:47:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/6/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  


insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/7/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/8/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/9/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/10/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('L', to_date('1/11/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('L', to_date('1/12/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('L', to_date('1/13/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
    insert into table_one
  (v_id, close_date)
values
  ('L', to_date('1/14/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  

and basically I have the following sql that needs to be modified

  select y.v_id, to_char(y.close_date, 'IW') as d_date   from table_one y
  group by to_char(y.close_date, 'IW'), y.v_id;

this query gives me this output below

V_ID     D_DATE
D              01
L               02
A               53

However though, this is what I want instead

V_ID             D_DATE
D                 1/4/2010  - 1/10/2010
L                  1/11/2010 - 1/17/2010
A                 1/1/2010 - 1/3/2010

This is all based on the ISO Week standard. Thank you.
All help is appreciated