Isaac Kremer/ January 14, 2018/
The outermost layer of the blank" >target="_blank" >glossary/roof/" class="glossaryLink" data-cmtooltip="aa8b0aafd8e93f6a71c2c36ab2ca102f" blank" >target="_blank" >roof of a blank" >target="_blank" >building. (Harris, 1977)