Paleontological Society

Palgrave Macmillan Ltd.

Paper Industry Technical Association

Pearson

Pearson Crystal Data

Pennsylvenia State University

PennWell Corp.

Pergamon Press

Perspective Publications Private Limited

Pharmaceutical Press

Philosophy Documentation Center

Philosophy Education Society, Inc.

PHILOSOPHY NOW

PHOTON Publishing GmbH

Pierian Press

Pion Ltd.

PION Publication

Polska Akademia Nauk

Portland Costomer Service

Portland Press Ltd

Precast - Prestressed Concrete Institute

Preston Publications, Inc.

Princeton University Press

Printerhall Ltd.

Professional Engineering Publishing Ltd.

Project Hope

ProQuest

Psychology Press

Publication Committee for the Tokyo Journal of Mathematics

Publishing House Element

Publishing Technology PLC.