@article{005041645,
title = "Content of available phosphorus exchangeable potassium and acidity in soils of agricultural land in the ussr",
author = "Derzhavin, L.M. and Leonova, I.N. and Florinskii, M.A. and El&apos and darova, V.G.",
year = "1976",
journal = "Pochvovedenie",
volume = "2",
pages = "39-48",
url = "https://eurekamag.com/research/005/041/005041645.php"
}