N. I.

The Penguin Dictionary of Biology: Eleventh Edition (Dictionary, Penguin)

By Hickman, Michael, Thain, Michael, Turvey, Raymond, Hickman, C. J., Abercrombie, Michael, Johnson, N. I.

Theory of Approximation

By Akhiezer, N. I., Achieser, Hyman, C.J.

Theory of Linear Operators in Hilbert Space (Dover Books on Mathematics)

By Akhiezer, N. I.