Изготовление электронных копий любых изданий

Geomedical problems related to aluminium, iron and manganese Intern. symp. arranged in Oslo 18.-19. Nov. 1993 by the working group soils a. geomedicine of the Intern. soc. of soil science a. the Norw. acad. of science a. letters The Norw. acad. of science a. letters ; Ed. by Jul Lag