Sargsyan, M. et al. 2013. QUANTITIES OF AMMONIFIERS IN BROWN FOREST SOILS AFTER INTRODUCTION OF CRYSTALLOPHORES. Proceedings of the YSU B: Chemical and Biological Sciences. 47, 1 (230) (Mar. 2013), 40–43. DOI:https://doi.org/10.46991/PYSU:B/2013.47.1.040.