Gale, M.r. Soil Productivity Index: Perdictions of Site Quality for White Spruce Plantations / M.R. Gale, D.F. Grigal, R.B. Harding. -- 1.vyd.

In Soil Science Society of American Journal. -- Vol.55, no.6. (1991), s. 1701-1708. graf.

I. Grigal, D.F.
II. Harding, R.B.
III. Soil Science Society of American Journal. -- Vol.55, no.6. (1991), s. 1701-1708. graf.
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