a guide for university researchers Smith, Robert V. 1942- creator text programmed text txu ---- 1980 monographic ENG xi, 91 p. : il. ; 24 cm. specialized by Robert V. Smith ; ill. by Sally Blakemore. Incluye referencia bibliográfica: p. 89-91 INVESTIGACION CIENTIFICA ESTADOS UNIDOS 001.43 S54 1980 0292715234 https://www.cicy.mx/sitios/sib/doctoelectronico/693.pdf https://www.cicy.mx/sitios/sib/doctoelectronico/693.pdf 200619 20260521090058.0 000000693