Van Andel, P Significance of positive patch tests to wood tars. [electronic resource] - Transactions of the St. John's Hospital Dermatological Society 1974 - 94-8 p. digital Publication Type: Journal Article ISSN: 0036-2891 Subjects--Topical Terms: AntigensBalsamsCoal Tar--immunologyCross ReactionsHumansPatch TestsPerfumeTars--immunologyTurpentine