海量图书期刊资源，随时随地畅享阅读乐趣
Meiosis in pollen mother cells of Pinus contortaINGER EKBERG; GÖSTA ERIKSSON; ALENA JONSSON · 1972
Thermo- and photoperiodic influence on the variation in juvenile growth in open pollinated Carpinus betulus L. familiesALENA JONSSON; INGER EKBERG; GÖSTA ERIKSSON; CHRISTINA NILSSON · 1988