There has been data ("Pimsleur Punjabi Level 1 Lesson 4 MP3: Learn to Speak and Understand Punjabi with Pimsleur Language Programs (Pimsleur Digital)") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Tue Sep 3 01:42:26 2019, so the data displayed here has been removed .