PAL, Susanta Kumar. Soil sampling and methods of analysis. Pitam Pura : New India Publishing Agensy, 2021. 1 online zdroj (xv, 315 stran). Available on Internet: <https://ebookcentral.proquest.com/lib/ujep-ebooks/detail.action?docID=6629557> ISBN 978-93-90083-99-2.