Cooperative mining series. : Bulletin [1]-33 /

No. 33 is the final no. of this series.Subtitle varies: no. 161̲8, 20, Illinois coal mining investigations., no. 19, 21-33, Illinois mining investigations.Title varies: no. 1-15, Illinois coal mining investigation, cooperative agreement ... Bulletin., no. 16-18, 20, Cooperative coal mining series. Bulletin., no. 19, 21-33, Cooperative mining series. Bulletin.No. 1 (Preliminary report on organization and method of investigation) published without seies title or number. Nos. 4-7, 12, called also volume 1, no. 1-4, 7.Prepared under a cooperative agreement between the Illinois State geological survey division, the engineering experiment station of th University of Illinois (no. 1-13, Department of mining engineering, University of Illinois) and (no. 1-30) the U.S. Bureau of mines.At head of title, no. 16-18; State of Illinois. State geological survey; no. 19-33: State of Illinois. Department of registration and education ... division of the State geological survey ...Mode of access: Internet