ArchiveVolume 4, Issue 4, August 2015
Jelena Helmer, Erich Kasten
Pages: 139-146     Published Online: Jun. 13, 2015
DOI: 10.11648/j.pbs.20150404.11        Views 5372      Downloads 153
Idoko Joseph Onyebuchukwu, Muyiwa Adeniyi Sholarin, Agoha Benedict Chico Emerenwa
Pages: 147-153     Published Online: Jun. 23, 2015
DOI: 10.11648/j.pbs.20150404.12        Views 6482      Downloads 242
Nasser Saleh Al-Mansour, Yasir Saad Almukhaizeem, Ahmed Mohammed Alduais
Pages: 154-164     Published Online: Jun. 25, 2015
DOI: 10.11648/j.pbs.20150404.13        Views 5401      Downloads 142
Anette Sandra Cebula, Erich Kasten
Pages: 165-169     Published Online: Jun. 30, 2015
DOI: 10.11648/j.pbs.20150404.14        Views 5038      Downloads 251
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