Nieznany wykaz lokomotyw leśnych kolei wąskotorowych w Polsce z lat 1956–1970

The article presents the contents of a recently discovered list detailing steam and diesel locomotives used in Poland from 1956 to 1970 on narrow-gauge railways of the State Forests. The document includes information such as the markings of individual locomotives, their manufacturers, production years, technical specifications, and operational history on specific forest railways. This information is presented in tabular format and supplemented with commentary on locomotive marking practices specific to forest railways, as well as a comprehensive literature review.