Prefix Format Example
N NEWSLETTERS month/year, page(s) N2/90.7-8
N NEWSLETTERS /month/year, page(s) N/2/07
T TRANSACTIONS volume/number.page(s) T1/2, p6
M MEMOIRS 1964-1969 year.page(s) M1966.51-52
M MEMOIRS 1971-1974 volume/number.page(s) M2/1.12
IS INDIVIDUAL SURVEY SERIES number.page(s) IS1.6
OP OCCASIONAL PUBLICATIONS number.page(s) OP5.6
BM BRITISH MINING number.page(s) BM21.3,33,38,41
NOTE: Some page numbers are sometimes written differently:
eg. N2/90.7-8 could also be written N2/90, p. 7-8