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1
Earth sciences : Teacher's book / Christopher St J Yates.
England : Phoenix ELT, 1988
29 p. ; 25 cm.
2
General engineering / Christine M Johnson, David Johnson; Vaughan James general editor.
New York : Prentice Hall, 1992.
154 tr. : ill. ; 25 cm.
3
General engineering : Teacher's book / Christine M Johnson, David Johnson, Vaughan James general editor.
New York : Prentice Hall Macmilan, 1995
37p. : ill. ; 25 cm.