01009nam0-2200289 --450 991086760130332120240708085544.0902200552620240708d1975----kmuy0itay5050 baengNL 001yyHumic substancestheir structure and function in the biosphereproceedings of an international meeting held at Nieuwersluis, the Netherlands, may 29-31, 1972editors D. Povoledo and H.L. GoltermanWageningenCentre for Agricultural Publishing and Documentation1975368 p.23 cmPedologia631.4723itaGolterman,H. L.Povoledo,D.International meeting <on> Humic substances <1972 ; Nieuwersluis, NL>1743838ITUNINAREICATUNIMARCBK9910867601303321A MIC 26169576/2024FAGBCFAGBCHumic substances4172499UNINA