https://hdl.handle.net/10929/33105 2021-04-26T00:26:52Z https://hdl.handle.net/10929/40801 The Mineral Industry of New Jersey for 1930 and preliminary estimates for 1931 New Jersey. Department of Conservation and Development.; Johnson, Meredith 1932-01-01T00:00:00Z https://hdl.handle.net/10929/40800 The Mineral Industry of New Jersey 1929 New Jersey. Department of Conservation and Development.; Johnson, Meredith 1931-01-01T00:00:00Z https://hdl.handle.net/10929/40799 The Mineral Industry of New Jersey 1928 New Jersey. Department of Conservation and Development.; Johnson, Meredith 1930-01-01T00:00:00Z https://hdl.handle.net/10929/40798 The Mineral Industry of New Jersey 1927 New Jersey. Department of Conservation and Development. 1929-01-01T00:00:00Z