@book{27234,
	author = {Heath, Royton E.},
	title = {Rock plants for small gardens,},
	publisher = {Collingridge Books,},
	year = {1969.},
	address = {London,},
	edition = {2nd ed. rev. and enl.},
	note = {First ed. published in 1957 under title: Miniature rock gardening in troughs and pans.}
}