MT. VERNON — — Mayor Mary Jane Chesley signed a proclamation earlier this week in observance of Heartland Desk and Derrick Club Month. The Association of Desk and Derrick Clubs is a non-profit international organization. Its purpose is to promote the educational and professional development of individuals employed in or affiliated with the petroleum, energy, and allied industries. Sharon Holland-Welge, seated to the left of the mayor, is president of the Heartland organization.