This text includes:
1: The Mountain Smoke Offering by Lhatsun Namkha Jigme
2: Wind Horse Smoke Offering by Dudjom Rinpoche
(If you are interested in the two practice texts above but with the commentary, it is available here Riwo Sang Chod With Commentary)
For those interested in the practice of Riwo Sang Chod, Lama Tharchin Rinpoche has taught extensively on the practice of Riwo Sang Chod in the past.
Teachings on the practice are available through Heart Teachings by Lama Tharchin Rinpoche and can purchased here: SERIES 21: Riwo Sang Chod
For those interested in this practice click this link to hear Lama Tharchin Rinpoche chanting the practice: Riwo Sang Chod Practice Recitation