Lego 7939 Pociąg towarowy, LEGO® Sets City - MojeKlocki24
LEGO 7939 Cargo Train Set Parts Inventory and Instructions - LEGO Reference Guide
LEGO Set 7939-1 Cargo Train (2010 City > Trains) | Rebrickable - Build with LEGO
LEGO Inventory for 7939-1 Cargo Train | Brickset
Lego City 7939 Cargo Train Parts Of Book 3 Only | eBay
I rebuilt 60052 into a different train with different cargo and vehicles, using only parts from the original set (excluding extras). I'll share the instructions at some point, and maybe try another