diff --git a/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 5.md b/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 5.md
index 7060b8dca..57ce8679d 100644
--- a/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 5.md	
+++ b/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 5.md	
@@ -8,3 +8,5 @@ We got a spectrum that we recorded for 1 minute. It looks like 5.9 after changin
 We had to adjust 11to 595.6V on the high voltage power supply to get our spectrum in the right place.
 
 We set the lower level discretization to 130. 75 still incorporated background noise.
+
+Accurate coefficients are in the cobalt ASCII file.