Grigal, D.F., (1973), "Note on the Hydrometer Method of Particle-Size Analysis", Minnesota Forestry Research Notes 245, School of Forestry, University of Minnesota
Minnesota Forestry Research Notes
Published as Scientific Journal Paper Series No. 8438 of the Minnesota Agricultural Experiment Station.
Note on the Hydrometer Method of Particle-Size Analysis.
St. Paul, Minn. : School of Forestry, University of Minnesota.
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