CONKLIN, Alfred R. Introduction to soil chemistry : analysis and instrumentation. 2nd edition. Hoboken : Wiley, [2014]. ©2014. 1 online zdroj (xvi, 347 stran). Chemical analysis ; vol. 178. Dostupné na internetu: <http://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=698078> ISBN 9781118773291.