Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 62. (Budapest 1970)

Kováts, D.: Quantitative xylotomic investigations on the xylem of our home ash trees

Fig. 8. Correlation between growth ring width and fibre length. Fraxinus excelsior L. (Great Plains). — Accessory graph for the co- and counterdecurrence of the tension and pression wood graphs. — r.c. = rate of co-decurrence, — h.c. = heterogeneity of counterdecurrence