This image was adapted from a picture posted to publicdomainq.net. All of the images on these sites are in the public domain i.e. CC0. This site is only in Japanese but can be easily navigated with Google Translate....
A simple notebook symbol....
Based on 'Scoutship' by Savino.
Based on 'Suitcase' by Duion.
Based on 'China_gong' by Sanja.
Based on 'Drumkit' by sandsound.
Based on 'Robinson R44 Raven' by Helijah.