The Oxford spelling dictionary /
Black´s rhyming and spelling dictionary /
The Penguin English dictionary /
The Penguin dictionary of chemistry /
The Penguin dictionary of botany /
The Penguin dictionary of science /
The Penguin Dictionary of Commerce /
The Penguin dictionary of biology /
The Penguin Dictionary of Psychology /
The Penguin Dictionary of Quotations /
The Penguin dictionary of physics /
The Penguin dictionary of mathematics /
The Penguin dictionary of sociology /
The Penguin dictionary of building /
The Penguin Russian dictionary. /
The Penguin dictionary of electronics /
The Penguin dictionary of geology /
The Penguin dictionary of psychology /