--- trunk/libf/phylmd/FCTTRE.f90	2011/01/06 17:52:19	38
+++ trunk/libf/phylmd/FCTTRE.f90	2011/01/25 15:11:05	39
@@ -7,6 +7,7 @@
   ! constants, assuming the partial pressure of water vapour is given
   ! by a first order Taylor expansion of Qs(T) with respect to
   ! temperature, using constants in yoethf_m.
+  ! Probably from Buck, 1981, Journal of Applied Meteorology, 20, 1527.
 
   implicit none