Mayall N. The Sky Observer's Guide. A Handbook for Amateur Astronomers 1985

Textbook in PDF format

Newton and Margaret Mayall are well known among both professional and amateur astronomers. Mr. Mayall, who is a consulting engineer, has been active in astronomy since youth. Mrs. Mayall, formerly Pickering Memorial Astronomer at Harvard Observatory, is Director Emeritus of the American Association of Variable Star Observers (AAVSO), the largest organization of active amateurs