Nitrogen-15 in soil plant studies; proceedings.
Research co-ordination meeting on Recent developments in the use of Nitrogen-15 in soil plant studies Sofia, Dec.1-5,1969.
Nitrogen-15 in soil plant studies; proceedings. - Vienna IAEA 1971 - 257p. - Panel proceeding series .
631.416.1 1969.12.1/5 (082.2) L1
Nitrogen-15 in soil plant studies; proceedings. - Vienna IAEA 1971 - 257p. - Panel proceeding series .
631.416.1 1969.12.1/5 (082.2) L1


