@book{kramer1938,
  author = {Krämer, A.},
  title  = {Ralik-Ratak (Marshall Islands). Hamburg, Germany: Friederichsen, De Gruyter and Co.. 1938. HRAF ms: xii, 1-438},
  url    = {https://ehrafworldcultures-yale-edu/ehrafe/citation.do?method=citation&forward=browseCulturesFullContext&col=OR11MarshalleseOceaniaOceania&docId=or11-002&tocOffsetId=tocPubInfoP},
  year   = {1938}
}