Effect of Clean Air with Rich Negative Oxygen Ions on Propagating Ability of Silkworm
LI Dong-jie, WEI Jing-fang, WANG Chun, LI Shi-jie
ACTA AGRICULTURAE BOREALI-SINICA . 2002, (S1): 148 -151 .  DOI: 10.3321/j.issn:1000-7091.2002.z1.033