https://rbookia.web.app/issuu-dga/0486428834/allyn-jthompson/making-your-own-telescope-dover-books-on-astronomy
"EbookMakingYourOwnTelescope(DoverBooksonAstronomy)by AllynJ.Thompson"
"GetthePDFversionoftheentirebookMakingYourOwnTelescope (DoverBooksonAstronomy)byAllynJ.ThompsoninPDFformatfor fullpages."
"ImmerseyourselfinthevastdigitalbookprovidedinPDFformwritten byAllynJ Thompson,titledMakingYourOwnTelescope(DoverBooks onAstronomy).Accesstheuncutworkabsolutelyfree.Getaccessin PDFformatwithnodelay."
"Toexpandyourreadingoptions,makesuretovisitmyaccountand explorethewiderangeofbooksavailable."