6
by Roberts, R. G.
Published 1990
Cambridge University Press

8
by Powell, R. G.
Published 1990
Macmillan Education UK

9
by Sharma, R.G.
Published 2021
Springer International Publishing

11
by White, R. G.
Published 1746
printed by E. Craighton and W. Jackson

12
by Zhbankov, R. G.
Published 1966
Springer US

13
by Asmar, R. G.
Published 1991
Springer Paris

14
by Athay, R.G.
Published 1972
Springer Netherlands

15
by Robins, R. G.
Published 2004
Oxford University Press

16
by Sharma, R.G.
Published 2015
Springer International Publishing

17
by Athay, R.G.
Published 1976
Springer Netherlands

18
by Chambers, R.G.
Published 1990
Springer Netherlands

19
by Meyers, R.G.
Published 1988
Springer Netherlands

20
by Hunsperger, R. G.
Published 1982
Springer Berlin Heidelberg