TY  - RPRT
TI  - Major and trace elements in spruce needles by NAA.
AU  - A Wyttenbach
AU  - S Bajo
AU  - L Tobler
DO  - 10.1007/bf02992674
UR  - https://pubmed.ncbi.nlm.nih.gov/1704721/
ID  - 1704721
ER  -