ABSTRACT

https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003310891/4f5ece18-8725-4753-a4bc-0bbc77fc22dd/content/Common_05.tif" xmlns:xlink="https://www.w3.org/1999/xlink"> The word planet is represented with a building icon with four pillars.