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diff --git a/Dragon/src/LIBD10.F b/Dragon/src/LIBD10.F
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+*DECK LIBD10
+#if defined(HDF5_LIB)
+      SUBROUTINE LIBD10 (MAXDIL,NAMFIL,HNISOR,NDIL,DILUT)
+*
+*-----------------------------------------------------------------------
+*
+*Purpose:
+* Find the dilutions corresponding to a resonant isotope within a
+* library in Apolib-3 format.
+*
+*Copyright:
+* Copyright (C) 2022 Ecole Polytechnique de Montreal
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation; either
+* version 2.1 of the License, or (at your option) any later version
+*
+*Author(s): A. Hebert
+*
+*Parameters: input
+* MAXDIL  maximum number of dilutions.
+* NAMFIL  name of the APOLIB-3 file.
+* HNISOR  library name of the resonant isotope.
+*
+*Parameters: output
+* NDIL    number of finite dilutions.
+* DILUT   dilutions.
+*
+*-----------------------------------------------------------------------
+*
+      USE GANLIB
+      USE hdf5_wrap
+*----
+*  SUBROUTINE ARGUMENTS
+*----
+      INTEGER MAXDIL,NDIL
+      CHARACTER HNISOR*12,NAMFIL*(*)
+      REAL DILUT(MAXDIL)
+*----
+*  LOCAL VARIABLES
+*----
+      TYPE(C_PTR) IPAP
+      CHARACTER RECNAM*80
+      REAL, ALLOCATABLE, DIMENSION(:) :: BGXS
+*----
+*  OPEN AND PROBE THE APOLIB-3 FILE.
+*----
+      CALL hdf5_open_file(NAMFIL, IPAP, .TRUE.)
+      WRITE(RECNAM,'(9HIsotopes/,A,15H/HomoRates/BgXS)') TRIM(HNISOR)
+      CALL hdf5_read_data(IPAP, RECNAM, BGXS)
+      NDIL=SIZE(BGXS)
+      IF(NDIL.GT.MAXDIL) CALL XABORT('LIBD10: MAXDIL IS TOO SMALL.')
+      DILUT(:NDIL)=BGXS(:)
+      NDIL=NDIL-1
+      DEALLOCATE(BGXS)
+      CALL hdf5_close_file(IPAP)
+#else
+      SUBROUTINE LIBD10
+      CALL XABORT('LIBD10: THE HDF5 API IS NOT AVAILABLE.')
+#endif /* defined(HDF5_LIB) */
+      RETURN
+      END