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E. Haeffner

E.H. ยท Ehlen Peter, Haeffner Gerd, Ricken Friedo Coreth Emerich

titleISBN-13
(ISBN-10)		year of publica-
tion		other author(s)
Hydrogenating Extraction of Coal978-92-825-9942-6
(92-825-9942-6)		1989H. Ben Nasr

E. Haefliger