TY - RPRT TI - Persistent allergic contact dermatitis from squaric acid dibutyl ester. AU - J F Fowler AU - S J Hodge AU - G R Tobin PY - 1993 DO - 10.1016/s0190-9622(08)81147-4 UR - https://pubmed.ncbi.nlm.nih.gov/8432926/ ID - 8432926 ER -