na INLIS000000000009519 20221119102327 0010-1118009519 221119 g 0 eng Isotopes and radiation in soil organic-matter studies : proceedings of the symposiumm on the use of isotopes and radiation in soil organic-matter studies jointly organized by International Atomic Energy Agency and the Food and Agriculture Organization of the United Nations in co-operation with the International Soil Science Society held in Vienna, 15-19 July 1968 / IAEA, FAO and International Soil Science Society Vienna : International Atomic Energy Agency, 1968 584 p. : ill. ; 23 cm. 631.46 SYM i 631.46 SOIL BIOLOGY SOIL ORGANIC MATER ISOTOPES RADIATION SYMPOSIUM ON ISOTOPES AND RADIATION IN SOIL ORGANIC-MATTER STUDIES (1968 : Vienna) 1007/77 511/73