1985 Edition International Directory of Energy Meetings & Trade ShowsRobert M. Wilkerson · First published 1984Open the Tome
1983 International Directory of Petroleum Meetings and Trade ShowsRobert M. Wilkerson · First published 1982Open the Tome
Crude oil pipeline atlas of the United States and Canada, 1981Robert M. Wilkerson, Dan L. Reed · First published 1981Open the Tome
