Kitcher, Chris Electrical installation calculations. Advanced : for technical certificate and NVQ level 3 Christopher Kitcher and A. J. Watkins. - 7th ed. - London : Routledge, 2009 - 210 p. ill. ISBN: 9780415810036 (pbk.) Subjects--Topical Terms: Electric wiring--Mathematics--Great Britain LC Class. No.: TK3221 / K57 2009