diff --git a/README.md b/README.md
index f3e1a26..13f2e7c 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # sattools
-This is a fork of cbassa's sattools to try to get it to work with
-free software giza instead of proprietary and unmaintained pgplot.
+This is a fork of Cees Bassa's `sattools` to get it to work with
+free software `giza` instead of proprietary and unmaintained `pgplot`.
 
 
 # Giza Sattools
@@ -269,19 +269,20 @@ Latest fix at top.
 # Upstream
 See `README-upstream.md`.
 
-Sattools:
+Sattools, GPLv3.
 
 * https://github.com/cbassa/sattools
 
-Giza:
+Giza, GPLv2.
 
 * https://danieljprice.github.io/giza
 
-SGP4:
+SGP4, LGPLv3:
 
 * https://gitlab.com/pscrawford/dundee_sgp4/
 
+
 # License
-Same as upstream license, GPLv3.
+Same as upstream `sattools`, GPLv3.
 
 *Copyright (C) 2022, Jeff Moe*