00277nam a2200109 a 450000500170000008200200001710000060003711000160004324500500005926000330010930000250014220251203090509.0  a639.99,bD, syn  d_  aSynge, Hugh  aBiological aspects of rare plant conservation  aChichesterbJohn Wileyc1981  axxviii, 558p, 22 cm.