1. Abele, J. E.: The physical background to freezing point osmometry and its medical-biological applications. — Amer. J. med. Electronics 2: 32–41, 1963.
2. Abou Raya, M. A.: Apparatus for measuring transpiration rate at different air speeds. — Proc. egyptian Acad. Sci. 10: 12–16, 1955.
3. Aitchison, G. D., Butler, P. F., Gurr, C. G.: Techniques associated with the use of gypsum block soil moisture meters. — Aust. J. appl. Sci. 2: 56–75, 1951.
4. Alcock, M. B.: An improved electronic instrument for estimation of pasture yield. — Nature 203: 1309–1310, 1964.
5. Auibury, F. K., Tomlinson, W. M., Houston, C. E.: Tensiometers, automatic timing for sprinkler control. — Calif. Agr. 19: 2–4, 1965.