↑Birch: "I know why you're here and despite what my wife thinks, I know you'll do what's best for Oasis. After all, He chose you and He would never want to put us in harm's way." (Birch's dialogue)
↑The Lone Wanderer: "How did the Treeminders begin?" Laurel: "I'm afraid I can take none of the credit for my husband's creation. I arrived perhaps a year after him, well after he established the Treeminders." (Laurel's dialogue)
非正史
↑ 1.01.1Fallout 3 Official Game Guide Game of the Year Edition p.101: "Tree Father Birch 50岁的绿洲酋长，桦树大部分时间都在亭子里度过，坐在他的宝座上，偶尔吃饭，晚上睡几个小时。他还绕着绿洲走，更直接地监督村庄。虽然这个村庄表面上是一个民主公社，但树父桦树认为自己是该组织的精神和世俗领袖。他将自己塑造成类似于大祭司的角色，崇拜神灵哈罗德。 (Fallout 3 Official Game Guide Game of the Year Edition Wasteland Census)
