TY - RPRT TI - ELECTRON MICROSCOPE STUDIES ON DEVELOPING CRAYFISH OOCYTES WITH SPECIAL REFERENCE TO THE ORIGIN OF YOLK. AU - H W BEAMS AU - R G KESSEL PY - 1963 DO - 10.1083/jcb.18.3.621 UR - https://pubmed.ncbi.nlm.nih.gov/14064113/ ID - 14064113 ER -