Martindales Extra Pharmacopoeia, 24th Ed. 1958, (The Pharmaceutical Press).
2.
Bunker, T.D.The Contemporary Use of the Medicinal Leech . Injury The British Journal of Accident Surgery Vol. 12 (5) 430-432 (1981).
3.
Larouse Encyclopaedia of Animal Life. Hamlyn (1967).
4.
Elliott, J.M. and Mann, K.H., Key to British Freshwater Leeches , Freshwater Biological Association (1979 ).
5.
Frettor, V. and Graham, A., Functional Anatomy of Invertebrates. Academic Press (1976).
6.
Truman, Locomotion in Soft Bodied Animals. Arnold Press (1975).
7.
Lenggenhager, K., Das Rätsel des Blutegelbisses. Schweiz Med. Wschr.9, 227-228 (1936).
8.
Lindemann, B. , Das Verhalten der Kapillaren in der Umbelbung Blutegelbisses. Ach. Exptl. Path. Pharmak.193, 490-502 (1939).
9.
Haycraft, J.B. , On the Action of Secretion obtained from the Medicinal Leech on the Coagulation of Blood. Proc. R. Soc. , 36, 478-487 (1884).
10.
Yanagisawa, H. and Yokoi, E.The Purification of Hirudin and Action Principal of the HirudoMedicinalis Proc. Imp. Acad Tokyo, 14, (1938).
11.
Galun R. and Kindler S.H., Chemical Specificity of the Feeding Response in Hirudo Medicinalis . Comp. Biochem. Physiol.17, 69-73 (1966).
12.
Boroffka, I. , Osmotic and Volume Regulations in Hirudo. Z. Vergl., Physiol., 57, 348-375 (1968).
13.
Boroffka, I. , Altner, H. and Haupt, J., Function and Structure of Nephridium of Hirudo , Z. vergl. Physiol., 66, 421-438 (1970).
14.
Büsing K.H.Pseudomonas hirudinis. Ein bakterieller Darmsymbiont des Blutegels (Hirudo officinalis)Zbl. Bakt., 157, 478-484 (1951).
15.
Büsing, K.H. , Döll, W. and Freytag, K.Die Bakterienflora der medizinischen Blutegel . Arch. Microbiol., 19, 52-86 (1953).
16.
Bullock, G.L. , The Identification and Separation of Aeromonas liquefaciens from Pseudomonas fluorescens and related organisms occuring in diseased fish. Appl. Microbiol., 9, 587-590 (1961)
17.
" Mann, K.H.Leeches (Hirudinae). Their Structure, Physiology, Ecology and Embryology.Pergamon Press ( 1962 ).
18.
Lasansky, A. and Fuortes, M.G.F., The site of Origin of Electrical Responses in Visual cells of the Leech, Hirudo medicinalis. J. Cell. Biol., 42, 241-252 (1969).
