'... the statistics relating to the years 1967 to 1969 inclusive were published at the end of 1970 but for ease of reference these years are included in the current publication as well as 1970 and 1971'. - Introduction.
Deep sea trawlers : casualties to vessels and accidents to men : statistics for the years 1967-1971. ISBN 0115110682. Published by H.M.S.O. in 1973. Publication and catalogue information, links to buy online and reader comments.