TY - RPRT TI - ULTRASTRUCTURAL VARIATIONS BETWEEN HOOKED AND NONHOOKED LEPTOSPIRES. AU - C F SIMPSON AU - F H WHITE PY - 1964 DO - 10.1093/infdis/114.1.69 UR - https://pubmed.ncbi.nlm.nih.gov/14118051/ ID - 14118051 ER -