Investigating the possibilities for valorising phosphorite
Tamm, Kadriann
Yearbook 2018 / Geological Survey of Estonia
2019
/
p. 30-32 : ill
https://www.egt.ee/sites/default/files/content-editors/aastaraamat/egt_aastaraamat_eng_web.pdf
https://www.ester.ee/record=b5231713*est