Haddock, M. H. (1926). The location of mineral fields; modern procedure in the investigation of mineral areas and the subsequent verification of their extent, etc. C. Lockwood and son.

Haddock, M. H. The Location of Mineral Fields; Modern Procedure in the Investigation of Mineral Areas and the Subsequent Verification of Their Extent, Etc. [London]: C. Lockwood and son, 1926.

Haddock, M. H. The Location of Mineral Fields; Modern Procedure in the Investigation of Mineral Areas and the Subsequent Verification of Their Extent, Etc. C. Lockwood and son, 1926.