Can tree-ring delta N-15 be used as a proxy for foliar delta N-15 in European beech and Norway spruce?
Journal article published in 1970 by
G. Tomlinson,
N. Buchmann,
R. Siegwolf,
P. Weber,
A. Thimonier,
E. Graf Pannatier,
M. Schmitt,
M. Schaub,
P. Waldner 
