00497    a2200169   4500082001500000100002600015245004300041260005800084300001600142440003000158650003100188650001700219700002100236700002400257700002000281700002600301  a633.2bPRI  aGriffiths, D.J. eed.  aPrinciples of herbage seed production   aAberystwythbWelsh Plant Breeding Stationc1967g1967  a135p.c24cm  aTechnical bulletin  No. 1  aField and plantation crops  aForage crops  aBean,E.W. eed.   aRoberts, H.M. eed.  aLewis, J. eed.  aStoddart, J.L. eed.