TY - RPRT TI - Direct spot transfer technique for multiple thin layer chromatography. AU - S Narasimhulu AU - I Keswani AU - G L Flickinger PY - 1968 DO - 10.1016/s0039-128x(68)80075-3 UR - https://pubmed.ncbi.nlm.nih.gov/5683061/ ID - 5683061 ER -