Jamaican standard specification for standard hollow concrete blocks - Kingston 6 Winchester Rd., Kgn. 10 The Bureau 1985 - iv, 17p. ill. 31 cm - JS 35 : 1985 . JM86-232 ISBN: ISBN 976-604-048-6 (sd) Subjects--Topical Terms: Concrete blocks - Standards - Jamaica Dewey Class. No.: Pam 666.894 / Ja Jam