TY - RPRT TI - ESCA surface characterization of four IUPAC reference polymers. AU - B D Ratner AU - D Leach-Scampavia AU - D G Castner PY - 1993 DO - 10.1016/0142-9612(93)90229-u UR - https://pubmed.ncbi.nlm.nih.gov/8435459/ ID - 8435459 ER -