Helen Eccles

OCR AS Revise Chemistry A - New edition

By Helen Eccles, Mike Wooster, Rob Ritchie

OCR A Revise A2 Chemistry (AS and A2 Chemistry Revision Guides)

By Eccles, Helen, Wooster, Mike, Helen Eccles

Chemistry 1 (Cambridge Advanced Sciences)

By Ratcliff, Brian, Johnson, David, Eccles, Helen, Nicholson, John, Raffan, John, Brian Ratcliff, David Johnson, Helen Eccles, John Nicholson, John Raffan

Chemistry AS Level and A Level

By Brian Ratcliff, Helen Eccles, John Raffan, John Nicholson, David Johnson

A Revise A2 Level Chemistry for OCR Specification (AS and A2 Chemistry Revision Guides)

By Eccles, Ms Helen, Wooster, Mr Mike, Helen Eccles, Mike Wooster