"Report on the 1978 secondary survey from the National Foundation for Educational Research in England & Wales to the Department of Education & Science and the Welsh Officeā€¯.
At head of title: Assessment of Performance Unit.
Mathematical development. Secondary survey report no.1 : Wales. ISBN 0117901504. Published by H.M.S.O. in 1980. Publication and catalogue information, links to buy online and reader comments.