- List of Officers, 1970-71
- Presidential address: The Distribution of nature reserves in the Natural Regions of Lincolnshire
- Geology
- Kellaways and Cornbrash at Bishop Norton
- Botany
- Mycology
- Thorne Waste 1970
- Bryology
- Lichenology
- Vertebrate Zoology
- Entomology
- Conchology (Non-Marine)
- Report of the Hon Secretary 1971-72
- Obituary: Arnold Roebuck O.B.E., N.D.A., F.R.E.S., (1887 – 1971)
- List of Members Up as at July 1972
- Statement of Account 1971
- Lincolnshire Bird Report: Introduction
- Lincolnshire winter survey 1971
- Summary of nine years of British Trust for Ornithology Common Bird Census at Brattleby near Lincoln
- Manor Farm, Low Toynton
- Ringing report
- Selected ringing recoveries
- Lincolnshire coastal migration report
- General bird report
- Extreme dates of some common migrants
- List of contributors
- List of Officers, 1972-73
- Presidential address: Birds from my earliest days
- The Non-Marine Mollusca of a Fenland 10km National Grid Square
- Notes on the occurrence of Orobanche purpurea Jacq. in Lincolnshire
- Botany
- Lichenology
- Vertebrate Zoology
- Lepidoptera
- Report of the Hon Secretary 1972-73
- Lincolnshire Bird Report: Introduction
- Winter mute swan census 1972
- The autumn migration of the redstart at Gibraltar Point
- Ringing report
- Selected ringing recoveries
- General bird report
- Extreme dates of some common migrants
- List of contributors
- Presidential address: Natural History of Lincoln’s South Common – A 25 year Study
- A further note on the occurrence of Orobanche purpurea Jacq.. (Blue Broomrape) In Lincolnshire
- Botany
- Mycology
- Bryology and Lichenology
- Vertebrate Zoology
- Entomology
- Conchology (Non-Marine)
- Sphaerium solidum (Normand) A Freshwater Mussel New to the British Fauna
- Report of the Hon Secretary 1973-74
- Statement of Account 1973
- Lincolnshire Bird Report: Introduction
- Census of breeding black headed gulls, common terns, ringed plovers and little ringed plovers in 1973
- Results of bird counts 1968-71
- Ringing report
- Selected ringing recoveries
- General bird report
- Extreme dates of some common migrants
- List of contributors
- List of Officers, 1974-75
- Botany
- Mycology
- Bryology
- Lichenology
- Vertebrate Zoology
- Entomology
- Conchology (Non-Marine)
- Ornithology Report: introduction
- The mid-winter coot census 1974
- Ringing report
- General bird report
- Extreme dates of some common migrants
- List of contributors