The possible and the actual  readings in the metaphysics of modality 
edited by Michael J. Loux 
 - Ithaca, N.Y.  Cornell University Press  1979 
 - 334 p. : ill. ; 22 cm. 
<br/><br/>p. 317-329 
<br/><br/><label>ISBN: </label>0801491789 
<br/><br/><label>LCCN: </label>79-07618 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Modality (Logic)--Addresses, essays, lectures<br/>Modality (Theory of knowledge)--Addresses, essays, lectures<br/>Possibility--Addresses, essays, lectures<br/>Reality--Addresses, essays, lectures<br/>Metaphysics--Addresses, essays, lectures