A method of sampling coarse river-bed material. Wolman, M. G. EOS, Transactions American Geophysical Union, 35(6):951–956, 1954.
A method of sampling coarse river-bed material [link]Paper  bibtex   
@article{wolman_method_1954,
	title = {A method of sampling coarse river-bed material},
	volume = {35},
	url = {http://onlinelibrary.wiley.com/doi/10.1029/TR035i006p00951/full},
	number = {6},
	urldate = {2017-09-01},
	journal = {EOS, Transactions American Geophysical Union},
	author = {Wolman, M. Gordon},
	year = {1954},
	pages = {951--956},
}

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