Twenty years of seed research : by Lela V. Barton and William Crocker. at Boyce Thompson Institute for Plant Research / Barton, Lela V. Boyce Thompson Institute for Plant Research. Boyce Thompson Institute for Plant Research. Seeds Research. 581.46 631.531 London : Faber, 1948. 1948. 1948 Text 148 p., [10] leaves of plates : eng