@booklet {14, title = {The life histories and ecology of two species of Petrobius Leach, P. brevistylis and P. maritimus}, year = {1959}, note = {Owner: mattbowserAdded to JabRef: 2012.04.05}, month = {1959}, keywords = {Archaeognatha, Machilidae, Petrobiinae, Petrobius}, author = {Delany, M. J.} }