diff --git a/src/references.gmo b/src/references.gmo
index 95f7476..736e831 100644
--- a/src/references.gmo
+++ b/src/references.gmo
@@ -53,6 +53,8 @@ texts by solderpunk in the {gemini} protocol
 
 # non-electronic computers
 			
+=> https://wintermute.org/project/Rustic_Computing/ Brendan Howell - Rustic Computers
+=> https://www.jeffreythompson.org/human-computers.php Jeff Thompson ++ Human Computers
 => https://xkcd.com/505  - a bunch of rocks, randall munroe, xkcd
 => http://www.blikstein.com/paulo/projects/project_water.html programmable water - paulo blikstein 2003	
 => https://wiki.xxiivv.com/site/papier.html wdr papier computer