00296nam a2200109Ia 450000500170000008000240001710000210004124500700006226000250013230000100015758300190016720260716043033.0  a02.01.01 C748(1987)  aRivera, Pedro J.  aCBI and the twin plant scheme : are they development alternatives  b[s.n.]a[S.l.]c1987  a19 p.  c3/7/00kM2LMGR