What has the author Nathan C Grover written?

Nathan C. Grover has written:

'Surface water supply of the United States, 1916' -- subject(s): Water-supply, Stream measurements

'Surface water supply of the United States, 1914' -- subject(s): Water-supply, Stream measurements

'Surface water supply of the United States, 1918' -- subject(s): Water-supply, Stream measurements

'Surface water supply of the United States, 1921' -- subject(s): Water-supply, Stream measurements