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- [31] IRON, COPPER, ZINC, MANGANESE AND SELENIUM IN THE GROWING MINK 6TH INTERNATIONAL TRACE ELEMENT SYMP 1989, VOLS 1-5, 1989, : 858 - 864
- [32] MICRONUTRIENT SOIL TESTS - ZINC, IRON, MANGANESE AND COPPER NORTH DAKOTA AGRICULTURAL EXPERIMENT STATION BULLETIN, 1980, (499): : 18 - 21
- [33] The Role of Iron, Manganese, Zinc and Copper in Plant Nutrition SBORNIK Z 24. MEZINARODNI KONFERENCE RACIONALNI POUZITI HNOJIV: ZAMERENE NA VYZNAM A UPLATNENI MIKROELEMENTU VE VYZIVE ROSTLIN, 2018, : 23 - 32
- [36] CONCENTRATIONS OF CADMIUM, COPPER, IRON, MANGANESE, MOLYBDENUM, NICKEL, VANADIUM AND ZINC IN PART OF TROPICAL NORTHEAST ATLANTIC OCEAN DEEP-SEA RESEARCH, 1972, 19 (04): : 307 - &
- [39] RELATIVE EFFICACY OF METHODS OF ZINC, MANGANESE, IRON AND COPPER APPLICATION TO POTATO (SOLANUM-TUBEROSUM) INDIAN JOURNAL OF AGRICULTURAL SCIENCES, 1990, 60 (12): : 806 - 809
- [40] SERUM COPPER, IRON, MAGNESIUM AND ZINC CONCENTRATION IN NIGERIANS TRACE ELEMENTS AND ELECTROLYTES, 1995, 12 (01): : 52 - 54