TY - GEN AU - HALLIMOND,A F TI - Production of contrast in the microscope image by means of opaque diaphragms SN - 0028-0836 PY - 2010///0329 KW - Diaphragm KW - Microscopy N1 - Publication Type: Journal Article UR - https://doi.org/10.1038/159851a0 ER -