From 1923-1961 years were used in copy #'s - then began with volume #59 using volume #'s in items holdings.

NOTE: volumes 59-82 are available on CD-ROM, kept in Reference Office. Call# R000305 2007. "From 1894 to 1900 the College compiled and printed for a limited distribution, a number of lectures on International law. In 1901, the first formal volume of the "Blue Book" series was published. --Forward (v.59, p. iii). Beginning with v. 49 (1954) each volume has a distinctive title.