diff --git a/math/jama/pkg-descr b/math/jama/pkg-descr
index f5717d3b428e..c3338217b0e3 100644
--- a/math/jama/pkg-descr
+++ b/math/jama/pkg-descr
@@ -9,3 +9,5 @@ Mathworks and NIST, into C++
 * Eigenvalue solver
 
 Based on NIST's Template Numerical Toolkit.
+
+WWW: https://math.nist.gov/tnt/