Columbia subject headings:
Appropriate technology--Economic aspects--Philippines--Case studies.
Sugar trade--Effect of technological innovations on--Philippines.
Sugar--Manufacture and refining--Technological innovations--Philippines.
Harvard subject headings:
Appropriate technology--Economic aspects--Philippines--Case studies.
Sugar trade--Philippines.
Sugar--Manufacture and refining--Technological innovations--Philippines.
Princeton subject headings:
Appropriate technology--Economic aspects--Philippines--Case studies.
Sugar trade--Philippines--Effect of technological innovations on.
Sugar--Manufacture and refining--Philippines--Technological innovations.