Linguaphone's Polish course (1992) with three PDF's and audio files
Target language: Polish
Source language: English
Notes:
1. Three PDF's: Coursebook, Handbook, and Written Exercises.
2. Audio: the audio is complete but not split.
3. This course follows the 1970s format (i.e., each lesson has three parts) but updated to include written exercises.
4. Thirty lessons.