[warnings for a lot of content about child sexual abuse and rape]
these entries are taken from the book of the same name. it was written by David Lynch’s daughter, Jennifer Lynch, who was 22 at the time. i think it’s pretty believable.
there’s a large chunk of it also available here, but i don’t know if it’s the complete text: http://www.glastonberrygrove.net/texts/lpdiary.html
David Lynch with his daughter, Jennifer, behind the scenes of Eraserhead