Trip to Mexico correspondence

1967 January 3 to R. M. Wheeler from J. W. Guider (six page report regarding trip to see Cia. Minera Autlan operations with C. Tebelman, R. Ketter, M. Lipensky) 1967 February 17 – March 8 “Underground Mining at Acoxcatlan” (nine page report written in pencil - appears to be Wheeler handwriting) 1967 March 9 from R.M. Wheeler to J.W. Guider, RE: “110 Meter Longwall Versus 60 Meter Longwall at Acoxcatlan Molango Project” (three page memorandum) 1967 March 22 from J. W. Guider to S. J. Shale RE: Molango Mining 1967 June 19 from R. M. Wheeler to D. S. Lyons, Subject: Visit to Mexico June 8 – 16 (15 page original report) 1967 June 29 from R. M. Wheeler to D. S. Lyons, RE: Status of Acoxcatlan Mining Projects to Date 1967 June 30 from R. M. Wheeler to D. S. Lyons, RE: Trip to Mexico – June, 1967(seven page carbon copy report) 1967 July 3 to D. S. Lyons to S. J. Shale, RE: Molango Project (Wheeler’s final Report) 1967 July 13 from S. J. Shale to H. O. Olson (carbon copy of memorandum regarding enclosed copy of R.M. Wheeler’s Mexico trip report) 1967 July 28 from H. O. Olson to E. P. Leach Attn: R. P. Ketter, Subject: Comments on Report on R. Wheeler’s Trip to Mexico, June, 1967 1969 October 14 to R. M. Wheeler to D. L. Frith RE: Sources of Zinc Concentrates in Mexico (19 page carbon copy report)