Heller Steohen R Ed. Beilstein online database: Implementation content and retrieval Heller Steohen R Ed. - Washington American chemical society 1990 - 168p. cm. - ACS symposium series; 436 . Standard No.: 44203 Source: Textual Subjects--Topical Terms: Organic chemistryChemistry Dewey Class. No.: E5:(D65,8(B):3), N0