Ingold, Tim: The perception of the environment: essays on livelihood, dwelling & skill. London ; New York 2000. Internet: https://books.google.de/books?id=S3GakE5OT-kC&printsec=frontcover&dq=The+Perception+of+the+Environment.+Essays+on+Livelihood,+Dwelling,+and+Skills.&hl=en&sa=X&ved=0ahUKEwi0qpqTprDTAhWGhRoKHRLSDyAQ6AEIIjAA#v=onepage&q&f=false.