00270nam a22001097a 4500003000400000008004100004082001700045100002000062245005500082260001500137300000800152OSt230827b        |||||||| |||| 00| 0 eng d  a581.31bS99P  aHorsfall, J. G.  aOpportunities for chemical plant growth regulation  bBCPCc1978  a222