To Whom It May Concern:

I, Michael B. Clauer, hereby appoint Sheri H. Edison and
Steven J. Price, each and individually, my true and
lawful attorney-in-fact, for and in my name, place and stead,
with full power of substitution, to sign on my behalf any and
all Forms 3, 4 and 5 for the submission of such forms to the
Securities and Exchange Commission, and to take any and all
actions necessary or advisable to file such Forms with the
Securities and Exchange Commission.

IN WITNESS WHEREOF, the undersigned has caused these presents to
be executed on the 4th day of December 2014.


/s/ Michael B. Clauer
Michael B. Clauer




Signed or attested before me on the 4th day of December 2014 by
Michael B. Clauer.


/s/ Claudia Monroe
Notary Public

Clauida Monroe, Notary Public
State of Wisconsin
My Commission Expires November 27, 2016