What Star Designation System does Joseph Needham Use in "Science & Civilization in China"?

Does anyone here know what star designation system Joseph Needham uses in Science & Civilization in China (specifically, vol. 3 p. 259-61)? He refers to stars such as "3067i Draconis", "b3162 Ursae Minoris", and "4339 Camelopardi".

The first two designations seem to contain Bayer designations ("i Draconis" = 10 Draconis = HR 5226; "b Ursae Minoris" = 4 Ursae minoris = HR 5321). But I have no idea what the 4-digit numbers refer to. I've checked the Catalogue of the British Association, which uses a similar-ish format, but the corresponding stars listed there are not matches. All of these stars should be in or near the circumpolar region of the northern sky.