Search results for: Th. Lehmann
Österreichische Wasser- und Abfallwirtschaft > 2010 > 62 > 1-2 > 7-14
Transactions of the American Institute of Electrical Engineers > 1928 > 47 > 1 > 344 - 347
Transactions of the American Institute of Electrical Engineers > 1926 > XLV > 383 - 394