CONTENT AND DISTRIBUTION OF COPPER IN THE SOILS OF HEBEI
Sun Zuyan, Sun Quanxian, Zhou Qiru, Xu Changjin, Ma Wenqi
ACTA AGRICULTURAE BOREALI-SINICA . 1987, (2): 47 -52 .  DOI: 10.3321/j.issn:1000-7091.1987.02.007