https://www.abebooks.co.uk/9780769256832/Duets-Cello-Bass-Stoutamire-Albert-076925683X/plp
Duets For All Cello and Bass - Stoutamire, Albert; Henderson, Kenneth: 9780769256832 - AbeBooks
Duets for All enables any two instruments to play duets. Not only may two like-instruments such as two flutes play together, but two dissimilar instruments...
for all