Here we have a great modern(ish) sonata by the Austrian composer Norbert Sprongl, Originally published by Doblinger this fits your copy printed and published by them. It does include a bass part and piano part in orchestral tuning.
 
AI says
 
Norbert Sprongl (1892–1983) was a prolific Austrian composer known for his extensive output of orchestral and chamber music. His style is often characterised by "free dissonance," influenced by composers like Béla Bartók and Paul Hindemith. 

Early Life & Education: Born in Obermarkersdorf, he initially worked as a teacher for several decades before focusing entirely on music. He studied at the Vienna Academy of Music under Joseph Marx (composition) and Richard Lach (theory), graduating in 1933.
 
Recordings of his music, particularly for double bass, can be found on albums such as The Music Of... Rankl, Sprongl & Hindemith featuring bassist Leon Bosch. 
 
This is the printed copy
 
for the PDF Download please click here