TY - GEN AU - Petersen,W L AU - Sulc,S AU - Armstrong,C L TI - Effect of nurse cultures on the production of macro-calli and fertile plants from maize embryogenic suspension culture protoplasts SN - 0721-7714 PY - 2013///1113 N1 - Publication Type: Journal Article UR - https://doi.org/10.1007/BF00232376 ER -