Multi-volume work

Lankester, E.R. 1900-1909. A Treatise on Zoology. Adam and Charles Black, London. ≡

Volumes

1. 1903-1909. Part I. Introduction and Protozoa.
2. Minchin, E.A., Fowler, G.H. & Bourne, G.C., 1900. Part II. The Porifera and Coelentera, [Sep] 1900.
3. Benham, W.B., 1901. Part IV. The Platyhelmia, Mesozoa, and Nemertini, (Jul) 1901: [i]-[viii], 1-204.