3 q13 earnings_earnings_supplement 3 q11 earnings_presentation__final 3 q10 earnings_presentation (4) 3 q10 earnings_presentation (3) 3 q10 earnings_presentation (2) 3 q10 earnings_presentation (1) 3 q10 earnings_presentation 3 q09 erf_supplement_final 3 q09 earnings_presentation_final (2) 3 q09 earnings_presentation_final 2 q13 earnings_presentation 2 q11 erf_supplement_final 2 q11 earnings_presentation_final 2 q10 erf_supplement_7-14-10_final (4) 3 q10 earnings_press_release (2) 3 q10 earnings_press_release (1) 3 q10 earnings_press_release 3 q09 earnings_press_release_final 2 q13 earnings_press_release 2 q10 earnings_press_release_final 2 q09 earnings_press_release_final (1) 2 q09 earnings_press_release_final 1 q10 earnings_press_release_final (1) 1 q10 earnings_press_release_final 1 q09 earnings_press_release_final (2) 1 q09 earnings_press_release_final (1) 
