Contains mainly writings by Dr. Heller on varied aspects of the petroleum industry, notably Petroleum Chronology (history); International Petroleum Industry; petroleum technical information; and petroleum matters at the UN.

Refer also to the following folios: 5:48; 6:11; 4:14; 6:22; 6:29; 7:8; 7:21; 8:1-8:31; 9:29; 9:42; 10:3; 13:42; 13:43; 14:20; 14:45; 14:63; 15:16; 17:34; 17:56; 17:64; 18:12; 20:7; 20:17; 23:23.