http://nla.gov.au/nla.obj-1382220893
Laughlin, J. C & Tasmania. Department of Primary Industry. (1983). The effects of plant spacing, nutrition and irrigation on the growth, morphine production and incidence of lodging in poppies Retrieved December 5, 2025, from http://nla.gov.au/nla.obj-1382220893
Laughlin, J. C and Tasmania. Department of Primary Industry. The effects of plant spacing, nutrition and irrigation on the growth, morphine production and incidence of lodging in poppies [Hobart, Tas.]: Department of Primary Industry, 1983. Web. 5 December 2025 <http://nla.gov.au/nla.obj-1382220893>
Laughlin, J. C & Tasmania. Department of Primary Industry. 1983, The effects of plant spacing, nutrition and irrigation on the growth, morphine production and incidence of lodging in poppies Department of Primary Industry, [Hobart, Tas.] viewed 5 December 2025 http://nla.gov.au/nla.obj-1382220893
{{Citation
| author1=Laughlin, J. C.
| author2=Tasmania. Department of Primary Industry.
| title=The effects of plant spacing, nutrition and irrigation on the growth, morphine production and incidence of lodging in poppies
| year=1983
| section=electronic text (20 p.) : PDF file, tables ; 311,344 bytes.
| location=[Hobart, Tas.]
| publisher=Department of Primary Industry
| url=http://nla.gov.au/nla.obj-1382220893
| id=nla.obj-1382220893
| access-date=5 December 2025
| via=Trove
}}
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