Ref1

https://books.google.com.my/books?id=ZAvg3xLSdTYC&pg=PA157&lpg=PA157&dq=spinacia+oleracea+underutilized+crop&source=bl&ots=zDTfRKT7NG&sig=yomvTYPht1lFUUVMxplZT7mtYGU&hl=en&sa=X&redir_esc=y#v=onepage&q=spinacia%20oleracea%20underutilized%20crop&f=false