
https://archive.org/details/greatinternation00jerr
I went through 2 physical copies cutting out all the patterns to make the various planes.
https://www.amazon.com/dp/0671211293?tag=duckduckgo-osx-20&l...
The 70's truly were a creative decade....
A seemingly related book is on archive.org, the helicopter appears to be on page 38:
https://archive.org/details/The_Great_International_Paper_Ai...
There is a section in the book on the plane that won the duration contest. More or less a rectangular wing as I recall with just enough forward mass to give it forward movement and just enough dihedral to keep it stable.
Edit: found a page where the first image is of that record setting duration flight: http://www.codex99.com/design/the-paper-airplane-book.html
