@article{oai:soar-ir.repo.nii.ac.jp:00017180,
 author = {SASAKI,  Hachiro},
 journal = {Journal of the Shinshu University.},
 month = {May},
 note = {In this paper, the writer observed the coefficient of form in the percolation formulae of effective size-type from the point of view of the grading and made its negotiability greater by his Then, he got an approximate effective diameter of the specific-area-type (so-called Zunker's type) from the grading curve and showed graphically a method to get the coefficient of permeability in Darcy's law. This method includes porosity, coefficient of form of grain and form of grading curve, and, therefore, it has more reliability than Hazen's formula., Article, Journal of the Shinshu University. 3: 1-9(1953)},
 pages = {1--9},
 title = {ON COEFFICIENTS OF PERMEABILITY OF SAND-LAYERS},
 volume = {3},
 year = {1953}
}