@article{eage:/content/papers/10.3997/2214-4609-pdb.300.9, author = "A. Noon, David and Longstaff, Dennis and J. Yelf, Richard", title = "Advances in the development of step frequency ground penetrating radar", journal= "", year = "1994", volume = "", number = "", pages = "", doi = "https://doi.org/10.3997/2214-4609-pdb.300.9", url = "https://www.earthdoc.org/content/papers/10.3997/2214-4609-pdb.300.9", publisher = "European Association of Geoscientists & Engineers", issn = "2214-4609", type = "", eid = "cp-300-00009", }