The song is often included in French hymnals ( Chantons Dieu , Viens et chante , etc.), which you can purchase from religious music publishers.

Let me know if you need the lyrics, solfège notation, or a legal transcription tip — I can help with that directly.

I notice you're asking for a PDF of the sheet music for "Ah qu’ils sont beaux sur la montagne" — a traditional French patriotic or religious song (sometimes associated with the Cantique de l’Aviat).