B.E. Juniper, G.C. Cox, A.J. Gilchrist and P.R. Williams.
Techniques for Plant Electron Microscopy.
Blackwell Scientific Publications, Oxford & Edinburgh, 1970. 108pp.
Long out of print, of course, but this little handbook was written soon after standardised, reliable methods for preparing vaculated plant tissue had been developed and it is still a useful guide to the basics.