No. | samples from: |
I. | Original “historical” samples from approximately thirty years ago (1974) |
II. | August 2004 |
III. | November 2004 |
IV. | April 2005 |
V. | September 2005 |
VI. | August 2006 |
VII. | November 2006 |
VIII. | April 2007 |
IX. | July 2007 |