TY - GEN AU - McClay,D R AU - Armstrong,N A AU - Hardin,J TI - Pattern formation during gastrulation in the sea urchin embryo PY - 1993///0520 KW - Animals KW - Endoderm KW - physiology KW - Gastrula KW - Mesoderm KW - Microscopy, Electron, Scanning KW - Morphogenesis KW - Sea Urchins KW - embryology N1 - Publication Type: Journal Article ER -