1. ALLEN, D. E., 1969 The Victorian fern craze. London. Pp 83.
2. ALLEN D.E., 1976 The naturalist in Britain. A social history. London. Pp XII, 292.
3. BRIDSON, G. D. R., PHILLIPS, V. C. and HARVEY, A. P., 1980 Natural history manuscriptresourcesin the British Isles. London. Pp XXXVI, 473.
4. ELLIS, R., 1850 The chemistry of creation: beinganoutline of the chemistries of the earth, the air, the ocean. Society for the Promotion of Christian Knowledge. London. Pp 324.