TY - RPRT TI - Structural and Physiological Changes in Sugar Beet Leaves during Sink to Source Conversion. AU - R J Fellows AU - D R Geiger PY - 1974 DO - 10.1104/pp.54.6.877 UR - https://pubmed.ncbi.nlm.nih.gov/16658993/ ID - 16658993 ER -