00539nam a2200169Ia 4500008004100000020001500041082001800056100001800074245009800092260003300190300000800223650001600231650003700247653003800284653002000322653002700342170901s1987    xx            000 0 und d  a8185070083  a025.524bS16I  aSaxena, R. S. 0aInformation Retrieval Techniques and Reference Sources and Tools in Pure and Applied Sciences  aAgrabY. K. Publishersc1987  a144  aGneralities  aLibrary and Information sciences  aInformation storage and retrieval  aReference books  aScience and technology