共 4 条
[1]
MEASUREMENT OF TOTAL ACID DEPOSITION INTO SPRUCE AND BEECH FORESTS IN NORTHRHINE-WESTFALIA
[J].
ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE,
1985, 148 (06)
:689-698
[2]
BLOCK J., 1985, FORSCHUNG BERATUNG C
[3]
GEHRMANN J, 1987, FORST HOLZWIRT, V42, P141
[4]
1976, DIN38404C3