\'Third part of the Clavierubung consisting of various preludes on the catechism and other hymns for organ: For lovers and especially for connoisseurs of suchlike works, to refresh their spirits, provided by Johann Sebastian Bach,Royal Polish Court Composer and. \'Third part of the Clavierubung consisting of various preludes on the catechism and other hymns for organ: For lovers and especially for connoisseurs of suchlike works, to refresh their spirits, provided by Johann Sebastian Bach,Royal Polish Court Composer and