De Bernard Guyot.

https://www.letelepherique.org/Catalogue-de-films-Travaux-des-bois-et-travaux-des-champs-527-4631-0-14.html?ref=c29df790271c354462fe3077934046c5

https://www.letelepherique.org/Catalogue-de-films-Montage-d-un-teleski-Bellecombe-527-4632-0-14.html?ref=c29df790271c354462fe3077934046c5 

https://www.letelepherique.org/Catalogue-de-films-Montage-_Montagne-vivante_-527-7254-0-10.html?ref=c29df790271c354462fe3077934046c5