Изготовление электронных копий любых изданий

Excess and deficiency of trace elements in relation to human and animal health in Arctic and Subarctic regions Intern. symp. Arranged in Troms? a. Kirkenes 25.-28. May 1989 by the Working group Soils a. geomedicine of the Intern. soc. of soil science a. the Norw. acad. of science a. letters in co-operation with Nordic trace element soc. etc. ; Ed. by Jul Lag