Hertl's Double bass concerto written in 1957 presented here for bass and piano in orchestral tuning.
 
As David Heyes eloquently says;
Hertl's Concerto, which Pošta had premiered in 1958, a year after it was written. The three movement work is similar in style and construction to Hertl's Sonata for double bass and piano, beautifully written for the instrument, and in a modern but accessible style.
 
This is the printed copy, for the PDF Download click here